Acura TLX (2015)

Acura TLX

The 2015 Acura TLX is an all-new midsize sports sedan, the successor to the TL, and the third vehicle in Acura's re-envisioned performance-luxury sedan lineup, positioned between the ILX entry-luxury sedan and the RLX flagship Acura sedan.

Developed under the theme of 'Red Carpet Athlete,' the all-new TLX is designed to deliver a unique and compelling blend of sports-sedan athleticism and premium (red-carpet) luxury refinement, while delivering on Acura's 'Synergy Between Man and Machine' product direction - characterized by vehicles that perform "at the will of the driver" with intuitive, exhilarating and confidence-inspiring driving dynamics.

To achieve its dual mission of even sharper sports-sedan performance and increased luxury refinement, the TLX employs a host of new technologies, including two new, high-output direct-injected i-VTEC engines; two advanced new transmissions, including the world's first automotive Dual Clutch Transmission with torque converter; and the latest iterations of Acura precision-handling technologies - Precision All-Wheel Steer (P-AWS), next-generation Super-Handling All-Wheel Drive (SH-AWD), and Agile Handling Assist (AHA). These new technologies, in combination with its all-new body and chassis design, help define the TLX as the most dynamically advanced Acura ever produced; quick and responsive in sporty driving, stable and sure-footed in higher speed maneuvers, calm and quiet during long-distance cruising.

The TLX was also designed to appeal to a broader cross-section of luxury sports-sedan customers, with a lower cost of entry and wider range of powertrain and drivetrain options. There are three distinct TLX model offerings:

  • The TLX with 2.4-liter, 206-horsepower i-VTEC inline-4 with 8-speed Dual Clutch Transmission (8DCT) with torque converter, and Precision All-Wheel Steer (P-AWS);
  • The TLX with 3.5-liter, 290-horsepower i-VTEC V-6 with 9-speed automatic transmission and P-AWS;
  • And the TLX SH-AWD with next-generation Super-Handling All-Wheel Drive, available only with the 3.5-liter, 290 horsepower V-6 and 9-speed automatic.

All three TLX models carry a long list of standard luxury comfort, convenience and safety features. TLX models with the 2.4-liter engine can be upgraded to the Technology package and models with the 3.5-liter engine are available with Technology or the line-topping Advance Package.

Design and Packaging

The TLX's new chassis, powertrains and precision-handling technologies are wrapped in a lithe new exterior design with taut body surfaces, dynamically sculpted fender arches, and purposeful character lines. Its sporting character is emphasized by more compact sports-sedan proportions: Compared to the 2014 TL, the 2015 TLX is 3.7-inches shorter in overall length while maintaining the same wheelbase and tandem (front-to-rear) passenger-seating distance. The TLX's front and rear overhangs are shortened by 1.1 inches and 2.7 inches, respectively, when compared to the outgoing TL.

Acura's signature Jewel Eye™ LED headlights, standard on all models, lend the TLX an advanced and bright-eyed appearance while producing superior down-the-road illumination. Its LED lighting theme carries through to the LED-accented side mirrors, LED taillights and LED license plate illumination.

The TLX also features a new 60/40-split folding rear seatback for greater cargo-carrying flexibility and a new trunk design featuring a wider and deeper opening, a lower lift-over height, a fully flat cargo floor, and two new optional underfloor storage compartments.


The TLX body is designed to support the twin goals expressed in the vehicle's "Red Carpet Athlete" development theme - significantly enhanced luxury appeal, in terms of cabin quietness, ride comfort and styling refinement, and exhilarating and athletic sports-sedan performance - while also achieving class-leading fuel economy and crash safety ratings.

To achieve these sometimes-competing goals, Acura engineers created an all-new body design utilizing advanced materials, including ultra-high-strength steels, aluminum and magnesium, for rigidity, collision performance and weight savings. Special attention was paid to local body rigidity in areas where the body meets up with the suspension, engine and subframes, and to improvements in body sealing and noise insulation.

Vehicle aerodynamics also played a critical role in achieving class-leading fuel economy ratings. The TLX aerodynamics are improved by 15 percent (CdA) over the previous TL and based on internal testing, is the best (lowest) in its competitive class. At the same time, the body also is designed to provide a high level of occupant crash protection incorporating Acura's latest thinking in advanced body design, including the next-generation of Acura's Advanced Compatibility Engineering (ACE) front body structure and one-piece hot-stamped-steel door ring, first applied to the all-new 2014 Acura MDX.

Key TLX body features found in this section include:

  • Rigid, lightweight body
  • Hemmed rear wheel arch
  • Ultra-high strength steel
  • Aluminum components
  • Magnesium steering hanger beam
  • Advanced Compatibility Engineering (ACE) body structure
  • Jewel Eye™ LED Headlights
  • LED fog-, tail-, puddle-, license- and side-mirror lights
  • Auto-dimming side mirrors
  • Acoustic glass windshield
  • Acoustic foam applied to critical body sections
  • Electric trunk lid and fuel lid release
  • Cap-less refueling
  • Expanded View Driver's Mirror
  • Exclusive Acura exterior colors (Black-Bronze and Acura Silver Metallic)

Dynamic and Athletic Proportions

With its low and wide stance, the new 2015 TLX possesses a lithe exterior form, taut body surfaces and "just right" proportions for a sports sedan. This sporting character is further defined by shortened front and rear overhangs, dynamically sculpted fender arches, and purposeful character lines. Even the sculpted hood, with its sharply creased bilateral ridgelines, hints at the performance capabilities of the advanced new Acura powertrains it conceals. Meanwhile, the open and airy greenhouse provides commanding sight lines, with slim A-pillars providing improved visibility.

"Just Right" Dimensions

The 2015 TLX's "just right" body dimensions result from a careful balance of aerodynamic efficiency, interior roominess, dynamic performance, quietness and refinement, and design. Compared to the previous TL, the new TLX has the same 109.3-inch wheelbase, but is 3.8 inches shorter in overall length at 190.3 inches. This positions it between the smaller ILX entry-luxury sedan and flagship RLX sedan. Despite its more compact exterior footprint, the TLX offers a spacious interior that approaches the previous TL.

In comparison to its competitors, the TLX is longer than the Audi A4, BMW 3-Series, Lexus IS and Mercedes-Benz C-Class. It is also significantly wider than all of its direct competitors, including the Lexus ES and GS, and Mercedes-Benz E-Class.

Rigid Lightweight Body

Light weight and rigidity are the twin foundations for TLX comfort, handling and safety performance. Light weight is achieved by a combination of advanced engineering and the use of high-strength steel, magnesium and aluminum unit-body components. TLX body rigidity is enhanced by precise engineering, particularly in optimizing key component fitting points (up to 25 percent stiffer) for superior bending stiffness, and the unit-body structure's torsional rigidity is up 21-percent vs. the previous TL.

Aerodynamic Efficiency

In order to improve fuel efficiency and lower emissions, Acura designers merged the TLX's dynamic styling with a high level of aerodynamic efficiency, with a reduction in frontal area and lower running resistance (the amount of energy that is lost as the car moves along the road and through the air) as key goals.

Most of the running-resistance improvements are achieved via refinements to the TLX's body design, with even the smallest details calculated and confirmed by the use of sophisticated computational fluid dynamics (CFD), as well as scale wind tunnel and high-precision coast-down testing.

The new TLX is 0.4-inch lower and 1.0-inch narrower, with a slightly longer roofline, than the previous TL model. The result is 1.5-percent less frontal area than the previous TL, along with a 15-percent improvement in aerodynamics (CdA). Slightly narrower 225mm wide tires also replace the 245mm wide tires on the TL, further improving running efficiency. The end result is 16-percent reduction in running resistance compared to the previous TL. Internal testing shows the TLX to be the most aerodynamically efficient car in its class.

Hemmed Rear Wheel Arch

The rear wheel arches on the TLX use a special roll-hemming process that results in a cleaner edge and smoother appearance than on the previous TL model. In simple terms, the wheel-arch "hems" are the curved sheet-metal edges that surround the rear tires. In the new TLX, a special hemming process is used instead of spot welds to join the inner and outer fender sheet-metal on the inside of the fender opening. The result is a reduced tire-to-fender gap which improves aerodynamics, elimination of visible spot-welds and a cleaner appearance.

High Strength Steel

To achieve the high rigidity that promotes a smooth and quiet ride, crisp steering and handling, safety performance and long-term durability, the TLX utilizes six different grades of high-strength steel (HSS) in 52% of its body structure by weight. This high-grade, high-tensile strength steel adds the required rigidity for these positive traits without adding excessive weight, which in turn enhances fuel efficiency and lowers emissions. Altogether, 59-percent of the TLX body is created from a combination of high-strength steel, aluminum and magnesium.

High strength steel uses include:

  • UISBOR - USIBOR is a boron-alloyed steel with an aluminum-silicon coating that protects against oxidation during the heating, forming and hardening process. This high-strength hot-stamp steel is used for the TLX's door opening rings, for 5% of the unit body.
  • 980 grade HSS - Used in certain key structural points such as the front edges of the door sills, and in the A-pillars and B-pillars, for 2% of the unit body.
  • 780 grade HSS - Used for most structural load paths for ACE™, including the side sills and forward spars of unit body, for 2% of the unit body.
  • 590 grade HSS - Used for the front frame spars, floor and roof supports, for 35% of the unit body.
  • 440 grade HSS - Used in the front bulkhead, and in front and rear energy-absorbing structures, for 5% of the unit body.
  • 340 grade HSS - Sheet steel is used in the roof, for 3% of the unit body.

Aluminum Components

Aluminum stampings are used in certain key locations to reduce the TLX's curb weight, which provides benefits in handling, fuel efficiency and emissions reductions. Altogether, the aluminum components comprise 6-percent of the TLX's body weight, a savings of 27.8 pounds compared to comparable steel components.

Among the aluminum body components are:

  • Hood
  • Front bumper beam
  • Rear bumper beam
  • Front subframe (hybrid aluminum/steel)

Magnesium Steering Hanger Beam

Located behind the instrument panel, a 3-piece magnesium steering-hanger beam replaces the 26-piece aluminum and steel unit in the previous TL model. Its purpose is as a structural attachment point for the steering column, pedals and instrument panel, as well as a structural element that helps the passenger cabin retain its shape in certain collisions. This single robust magnesium component makes up 2-percent of the TLX's body weight.

The steering-hanger beam offers several advantages compared to the previous unit:

  • Simpler construction — Created from just three parts instead of the previous 26 different extrusions and stampings, the new magnesium steering hanger brace offers better construction precision.
  • Lighter weight — The magnesium steering hanger beam saves 2.7 pounds compared to a comparable aluminum and steel, contributing to the TLX's superior ride and handling, fuel efficiency and low emissions.
  • Better fit and finish — The exacting tolerances of the magnesium steering hanger brace in turn allow the instrument panel to fit better, exhibiting higher overall interior quality.

LED Lighting

The most comprehensive use of LED lighting on any Acura vehicle is a signature design element of the new TLX. From the dramatic Jewel Eye™ headlights to the convenient new puddle lights and back to the new taillights, the LED lighting provides crisp, bright, energy-efficient and long-lasting illumination that directly improves the driving and ownership experience. A summary of exterior lighting includes:

Forward Lighting

  • New LED headlights with incandescent-bulb turn signals
  • New LED parking and side marker lights
  • New LED under-mirror puddle lights (Advance grades)
  • LED front fog lights (Advance grades)

Rear Lighting

  • New LED tail and trunk-lid lights with incandescent-bulb turn signals and backup lights
  • New LED Center High Mount Stop Lights (CHMSL) with integrated cover
  • LED license-plate lights

Jewel Eye™ LED Headlights

Acura's signature Jewel Eye™ LED headlights give the TLX with an advanced and appearance while producing superior down-the-road illumination. The headlights utilize an array of high-intensity LED lamps to deliver outstanding light distribution, distant irradiation performance and light characteristics with a wavelength close to the human eye's luminosity curve. With five "Jewel Eye" lights per headlight, the LED lights provide improved down the road visibility compared to HID and halogen headlights.

On each side of the TLX, the low beams consist of three LED lights, while the innermost LED lights are utilized for high beams. The daytime running light (DRL) function utilizes all five lenses illuminated by LED's that are clearly and dramatically visible even in bright sunlight. Altogether, they create a dramatic and distinctive appearance with superior lighting capability.

Light distribution

Both the low and separate high beam LED headlights offer outstanding performance in all nighttime driving conditions, including highway, winding roads, intersections, and in inclement weather conditions. The result is that the driver can see further with uniformity, making high-speed nighttime driving easier and less fatiguing.

A summary of LED benefits include:

  • Outstanding light distribution that surpasses competitors
  • Excellent distant illumination performance
  • Clear illumination of the road surface and white lines
  • High visibility of the entire visible color spectrum (white, red, green, blue and yellow) compared to HID and halogen headlights
  • Response time when switching between low and high beam is shortened
  • Light congruity is improved between low and high beams

Power savings

Using just 65 watts total, the TLX's LED headlights use 41-percent less power than traditional halogen headlights, contributing to the TLX's overall operating efficiency.

Long lasting

Besides producing better light characteristics with lower energy usage, the TLX's LED headlights are longer lasting. With an estimated life expectancy of 10,000 hours, the LED headlights are projected to last five times longer than HID headlights and 10 times longer than traditional halogen headlight bulbs — contributing to less frequent replacement and potential associated cost savings. Further, their compact packaging allow for an improved aerodynamic frontal design.

LED Fog Lights

Included in the Advance Package, LED fog lights are positioned at the lower corners of the TLX's front fascia for maximum effectiveness and a bold appearance.

LED Taillights

LED taillights are part of the TLX's comprehensive exterior lighting array. Highly stylized to compliment the TLX body design, they are also brighter than traditional incandescent-bulb taillights, with a longer projected lifespan. Use of LEDs allows the addition of a "light pipe" styling element extending across the top of the lenses, contributing to the TLX's unique blend of design and engineering.

LED Puddle Lights

Included in the standard Smart Entry system, LED puddle lights positioned on the undersides of both side mirror housings enhance convenience when entering or leaving the vehicle. The LEDs automatically illuminate when the TLX detects the key fob approaching, in concert with the automatic interior illumination. The puddle lights also illuminate when the driver puts the TLX in Park and leaves the vehicle, fading off after about two seconds after locking the doors, or 30 seconds if the doors are not locked.

LED Side Mirror Lights

Keying off of the Jewel Eye™ LED headlights, each TLX mirror has LED lights fused into the mirror housing. The LEDs come to life when the turn indictors are activated, providing extra visibility and a high tech appearance.

Auto-Dimming Side Mirrors

Included in the Advance Package, auto-dimming side mirrors use the same activation sensor as the TLX's auto-dimming inside rearview mirror. The auto-dimming function of all three mirrors helps reduce glare during nighttime driving, especially from the headlights of following vehicles. Mirror glass area is 24-percent greater than on the previous TL model for improved rear visibility.

Expanded View Driver's Mirror

An Expanded View Driver's Mirror performs like two mirrors in one. The larger, inset portion of the mirror is relatively flat and works like a conventional sideview mirror to show objects to the side of the vehicle. The outer portion of the mirror is optically convex and functions as a wide-angle mirror to expand the driver's view to the side by approximately 39 percent, helping to reduce the blind-zone area.

Acoustic Glass

To reduce noise in the cabin The TLX utilizes a 4.5-mm thick, 3-layer acoustic windshield that consists of two layers of safety glass, separated by a thin acoustic resin center. The windshield reduces wind noise on in the higher frequency ranges, contributing to a luxurious feeling of isolation in the cabin. Also helping to mitigate wind, road and traffic noise in the cabin is 5.0-mm thick front door glass.

Auto Up-Down Side Windows

The 2015 TLX has power front and rear side windows with an auto-open and auto-close feature with anti-pinch.

Advanced Windshield Wiper System

The sleek, flat design of the wiper blades adds to the TLX's visual appeal. The flat blade design improves aerodynamic performance and reduces wind noise.

Headlights On With Wipers

Laws in some states require drivers to turn on the headlights when the wipers are operating in the rain. The new TLX helps its driver comply with these laws by automatically illuminating the headlights when the wipers are activated for five cycles or more (with headlight switch in AUTO). The headlights will remain illuminated for as long as the rain continues and the wipers are being operated. When the rain stops, the wiper activation also ceases, with the headlights remaining lit until the wipers stop. Operation is shown via an indicator on the instrument panel.

Rain Sensing Wipers

TLX models equipped with Technology Package and Advance Package include rain-sensing wipers that automatically activate if water is detected on the windshield.

Noise Mitigation

The TLX was designed to deliver vault-like quietness in all driving conditions, with major improvements achieved through enhancements in body stiffness, body and door sealing, and widespread sound insulation.

Acoustic Spray Foam

Applied to the unit body in 10 crucial locations around the door openings, acoustic spray foam helps create a solid foundation for a quieter cabin. The application process is automated and computer controlled, with the foam curing in 7 to 11 seconds after application for a highly precise and effective process.

Additional Materials and Sealing

Additional sound-absorptive materials are used throughout the unit body and interior, each dedicated to blocking a particular noise type and frequency. The materials include Thinsulate insulation, body sealers, noise-absorbing carpeting, and a high-density and dual density melt sheets. Liquid Applied Sound Deadening (LASD) is used in the trunk. Key areas of attention include the TLX's dashboard lower and floor area. Total body leakage is reduced 50 percent vs. the outgoing TL. The end result is reduced road noise and drumming on both concrete and asphalt surfaces, along with lower engine noise, for a more relaxing and pleasant driving experience.

Wind Noise

Significant improvements in both high-frequency and mid-frequency noise heard in the cabin were achieved by lowering the windshield-wiper height and optimizing the shape of the side mirrors. Special sealing methods in the B-pillars and C-pillars, and between the door gaps, further reduce audible wind noise.

Improved Door Sealing

The new TLX adopts the previous TL's 360-degree double seals that completely surround each passenger door. In addition, the TLX uses a third set of gap seals, positioned at the front, center, rear and bottom edges of each door, that help eliminate potential noise source caused by turbulent airflow in the cavities around the door hinges and latches. The doors' internal steel stampings receive further sound insulation in the form of large acoustic hole seals, internal foam sound barriers, and specially targeted B-pillar plugs.

Trunk Storage

The base TLX and TLX with Technology package offer a 13.2 cu. ft. of cargo volume, while the TLX with Advance Package has a larger 14.3 cu. ft. of cargo volume. There is no difference in storage capacity for the TLX two-wheel-drive models and TLX SH-AWD.

Compared to the previous TL, the trunk features an easier load-in height, a wider opening, and a flat, wide trunk floor that makes loading and unloading cargo easier. In specific, the interior dimensions are 14-percent wider, 12-percent deeper, with a 15-percent lower load-in height than the TL dimensions. The new flat floor extends from the rear bumper area, forward to the rear seatback for improved usability. The trunk hinges are fully hidden for a better visual appearance and to eliminate the possibility of catching on stored items. New 60/40 split-folding rear seatbacks allow storage of large or bulky items such as bicycles, skis or boards, or flat-screen televisions.

Cargo Bin System

All TLX models include a versatile trunk underfloor storage system that provides convenient storage for such items as groceries, emergency tools and other small items. The flip-up floor reveals a pair of storage bins (or a larger single bin with the Advance Package). These bins are ideal for everyday items such as groceries, shoes, etc. Flipping the floor panel again reveals an additional storage area designed for emergency tools, jumper cables, etc. A molded carrier holding the TLX's towing eyebolt and tire-inflator kit is also located in this area. Finally, the Advance Package includes a reversible floor panel. Carpeted on one side, it features a plastic surface on the backside to be used when wet or messy items — for instance, wetsuits, beach towels or a car cover — need to be carried in the trunk.

Exterior Colors

The 2015 TLX is available in seven exterior colors, including two metallic and five pearl colors. All colors have a strong character, offering expressive contrasts that compliment the TLX's body-panel curves and angles, while also exhibiting a smart luxury appearance. The acid-resistant epoxy clear-coat paint is superior to typical clear-coat paints for increased resistance to urban pollutants.

Acura TLX Exterior Colors

  • Acura Silver Metallic (New)
  • Basque Red Pearl
  • Bellanova White Pearl
  • Bronze-Black Pearl (New)
  • Crystal Black Pearl
  • Graphite Luster Metallic
  • Obsidian Blue Pearl


The TLX interior is designed and engineered to support the Red Carpet Athlete development theme of the new TLX, providing a high degree of refinement, luxury comfort and technological sophistication while supporting an exhilarating driving experience. High-end premium elements include a soft-touch, one-piece instrument panel upper cover, alloy and woodgrain accents and available leather seating with Milano bolsters.

Technology highlights include next-generation AcuraLink® (on Technology and Advance packages), which delivers a broad spectrum of information and entertainment choices, and Siri™ Eyes Free, which allows the TLX driver to use Apple's Siri on a compatible iPhone without taking their hands off the steering wheel.

Despite its more compact and nimble exterior footprint, the TLX has the same "tandem distance" - the distance that separates the front and rear rows of seats - as the TL sedan it replaces.

The TLX offers an abundance of available equipment, including a multi-view rearview camera, HomeLink®, Bluetooth® HandsFreeLink® wireless telephone interface AcuraLink Real-Time Traffic™ with Traffic Rerouting™, Color Multi-Information Display (MID) with turn-by-turn guidance and much more.

Design and Materials

The new TLX sport sedan interior builds on Acura's interior styling themes of clean and elegant lines, high-end detailing, and intuitive functionality. A design language called "dual personal structure" divides the space into areas centered on the driver and front passenger, complemented by a wide center stack and a highly functional center console that is easily accessible to each person.

The TLX utilizes Acura's On-Demand Multi-Information Display, a 2-screen interface with intuitive functionality. The 8-inch color audio/information screen is placed high in the instrument panel, where it's close to the driver's sight line. The lower screen, a 7-inch touch screen, eliminates the need for dozens of hard keys, and has contextual menus that make operation simple. The quality of interior materials in the TLX are held to a high standard, with available leather seating, and soft-touch materials throughout.

Driver-Oriented Cockpit

All important systems and controls in the TLX are positioned within easy reach of the driver. Controls for the systems used most frequently — audio, cruise control, Bluetooth® HandsFreeLink®, available satellite-linked Acura Navigation System with Voice Recognition™ and Multi-Information Display — are conveniently positioned on the steering wheel. The main instrumentation is an easy-to-read analog design, supplemented with digital and graphic displays. Typical of Acura interior design, the soft-touch switchgear of the TLX is engineered to deliver a quality feel and positive action. A standard multi-view rearview camera provides a choice of three different views, displayed on the bright, colorful 8-inch audio/information screen. The Technology Package adds Cross Traffic Monitor to the rear camera system, making it easier to maneuver out of parking spots with greater confidence.

Leather-Wrapped Steering Wheel

The leather-wrapped TLX steering wheel incorporates the most commonly used controls, allowing the driver to keep their hands on the wheel. Phone and audio controls are on the left side; cruise control and Multi-Information Display (MID) controls are on the right side. Grades with LKAS and/or ACC (LSF) have controls located on the right side of the steering wheel as well. Tucked out of view but within fingertip reach are a pair of paddle shifters that allow for manual operation of the Sequential SportShift transmission feature.


The TLX has analog instrumentation with large tachometer and speedometer flanking a Multi-Information Display (MID) that provides a range of information and trip computer functions. The tachometer and speedometer are flanked by an analog coolant-temperature and fuel-level gauge.

Multi-Information Display

The TLX instrument panel provides important vehicle information via a Multi-Information Display (MID) positioned between the tachometer and speedometer. Controls positioned on the right side of the steering wheel allow the driver to cycle the MID display through multiple screens of information from sources including LKAS and ACC and more. The Maintenance Minder™ system alerts the TLX driver of upcoming maintenance needs via the MID and should a fault occur with the vehicle, specific warning information will appear.

Audio/Information Screen

All TLX models feature a bright, full-color 8-inch audio/information screen positioned high in the center stack of the instrument panel. Its high placement puts it close to the driver's line of sight where it's easy to see. Besides audio system information, the screen also offers backup camera views when in reverse and access to a range of customizable features.

On-Demand Multi-Use Display™

As in the RLX and MDX, a 7-inch On Demand Multi-Use Display™ (ODMD) touch screen is positioned within easy reach of the driver and front passenger. The touchscreen controls a wide range of features, and with its contextual menus, displays relevant items while minimizing clutter. To simplify use, the screen offers audible and vibratory touch (haptic) feedback — both can be adjusted or shut off based on the owner's preference. Customizable shortcuts allow the TLX driver to set easy-to-access presets for Places, Phone, Climate and Audio functional categories.

One-Touch Turn Signals

The TLX's one-touch turn signals provide increased convenience for the driver when making routine lane changes. In addition to normal operation, a quick movement of the turn signal lever (less than one second) will cause the turn signals to flash three times.

Electric Parking Brake and Automatic Brake Hold

The Electric Parking Brake (EPB) on all TLX models makes using the parking brake easier. The parking brake is activated by pulling up on a rocker switch located on the center console. To release the parking brake, the driver simply presses on the accelerator pedal (while the seatbelt is buckled) or pushes on the parking brake switch.The TLX also features Automatic Brake Hold, which retains brake pressure when the vehicle is stopped, simplifying driving in heavy traffic or hills. Once the driver activates the system via a switch on the center console, Automatic Brake Hold will maintain brake pressure when the vehicle has come to a stop, even if the driver releases the brake pedal. The TLX then remains stopped — even on a hill — until the driver presses the accelerator pedal.

Integrated Dynamic System (IDS)

The Integrated Dynamics System allows drivers to customize their driving experience through four driver-selectable modes via a button, located near the console-mounted shifter. The modes are ECON, Normal, Sport and Sport+, and are shown in the Multi-Information Display.


Seating in the TLX is designed for all-day comfort, combined abundant lateral support for aggressive cornering. The available leather seating surfaces, perforated in the center sections and with Milano leather on front seat bolsters, are soft to the touch, with the right amount of surface friction to help keep passengers securely in position while cornering.

The driver's seat features 10-way power adjustability (8-way power seat plus 2-way power lumbar support). The front passenger seat offers 4-way power adjustment on 4-cyl. models, and 8-way power adjustment on V6-equipped cars.

Heated front seats are standard in the TLX. Electronic control allows for three temperature settings, along with fast warm-up and smooth, precise temperature control. Ventilated and heated front seats are standard in the Advance grade.

The driver's seat has a two-position memory and an easy entry/exit function that moves the seat 35 mm rearward when the front door is open to increase room for entry and exit.

Specially sculpted front seat seatbacks offer extra legroom for rear seat passengers. The outer seating positions are carefully engineered (complete with side bolsters) to combine solid lateral support with accommodating comfort on long trips. A new 60/40 split-folding rear seatback allows the TLX to accommodate long cargo, or to combine one or two rear seat passengers with long cargo. The seatbacks can be conveniently released via a pair of handles positioned in the trunk area.

Interior Lighting

Efficient driver control carries on after dark with analog instruments that are white backlit with LED lighting and feature high-contrast markings. The gauge package progressively illuminates to give the driver a welcoming feel upon entry. When the door is first opened, the instrument lighting comes to life and then brightens progressively to 100-percent illumination when the ignition is switched on. The illuminated instrument panel then comes alive, indicating that the car is ready to go. At the end of the drive, the instrument lighting dims progressively.

All the interior switches and vent controls are illuminated to make them easy to locate at night, including the switches on all four doors and the steering wheel. The connectivity pocket located in the front of the center console is internally lit, to make the connection of a smart phone easier. In addition to front and rear overhead interior lights and map lights, the TLX also has a complement of low-level interior cabin lighting. Blue ambient lighting in the ceiling illuminates the front center console and the rear flip-down armrest.

Front interior door handle areas are also have LED illumination, and the glove compartment and center armrest compartment are internally illuminated. The front doors have courtesy lights that illuminate when the doors are open. The TLX interior lights feature "theater dimming," which can be set by the driver to one of several dimming rates via the Multi-Information Display. The trunk has interior lighting, plus the trunk lid has lighting that illuminates the bumper and sill area when the lid is opened.

Center Console and Interior Convenience

The center console blends function and comfort with clean uncluttered layout that includes generous internal storage. A deeply padded armrest covers 269 cu. in. of illuminated internal storage. Compact transmission controls and an electronic parking brake free up space for two large cupholders, along with a connectivity pocket with sliding tray that accommodates a smartphone and cable, while neatly concealing the wiring from view.

A USB port inside the connectivity pocket with sliding tray allows for easy connection of items such as an iPod®, iPhone® or a removable flash drive storage device. The USB port is located alongside a 12-volt power outlet.

Inside the lockable glove compartment is a removable shelf that can help keep contents organized, or can be flipped to free up storage space in the main glove box compartment.

The TLX Owner's Manual and Navigation System Owner's Manual are provided on a CD, reducing the size of printed hard copies and freeing up additional space in the glove compartment. A printed Owner's Guide is provided, however, and the full printed Owner's and Navigation System manuals are available separately from Acura dealers.

In the rear seating area, a wide fold-down center armrest has a padded top. A dual beverage holder and a small tray sized to accommodate a smartphone are built into the rear armrest top.

Cargo Carrying Versatility

The TLX has a fully finished 13.2-cubic-foot trunk plus underfloor storage for small items. The Advance Package provides additional underfloor space, extending volume to 14.3 cu.-ft. (also available in Base and Technology grades). The trunk is both longer and wider than the TL and has a 15 percent lower lift-over height. 60/40 split-folding rear seatbacks allow the TLX to easily carry longer cargo. The seatbacks can be released and folded independently, using a pair of release handles that are easily accessible from the trunk area.

Electric Trunk Lid Release

There are four ways to open the trunk:

  • by pressing the trunk opener switch located on the driver side instrument panel
  • with the key fob
  • with the trunk opener switch located in the middle of the trunk, underneath the trunk lid overhang
  • in case the electric trunk release is inoperative, the trunk may be unlocked and opened by using the key stored in the key fob.

The trunk's emergency key cylinder is located beneath a cover near the headrest on the driver's side rear seatback.

The contents of the trunk can be secured when the TLX is given to a valet parking attendant. A switch located in the glove compartment can disable the electric trunk release feature. The owner then locks the glove compartment and gives the valet the TLX remote fob with the emergency backup key removed. This allows the valet to drive, lock or unlock the vehicle, without having access to the glove box or trunk.

GPS-Linked, Dual-Zone Automatic Climate Control

The TLX has a GPS-linked (when equipped with navigation system) temperature control, dual-zone automatic climate control system that lets the driver and front passenger set temperatures to their individual liking.

To operate the HVAC system, easy-to-read buttons and controls are positioned within convenient reach. The HVAC system can also be controlled by voice command, and additional custom settings can be accessed through the 7-inch On-Demand Multi-Use Display™ interface. The climate control system's control logic is designed to provide smooth operation with subtle changes in airflow.

With its position-sensing ability, the available GPS navigation system contributes to overall passenger comfort with a 3D solar sensing feature. Based on continuously updated vehicle position information, the navigation system determines the position of the sun relative to the driver and passenger. Combining this information with input from a solar sensor located on top of the instrument panel, the climate control system automatically adjusts the temperature from side to side as needed to compensate for asymmetrical solar heating. Further, on the Advance Package, the heated and ventilated front seats are electronically linked to the climate control system.

Siri™ Eyes Free

Siri™ Eyes Free is standard on the TLX. When the TLX's Bluetooth® HandsFreeLink® system is paired with a compatible iPhone, Siri Eyes Free allows you to use many of the features of Siri without removing your hands from the steering wheel. A push of approximately two seconds on the steering wheel-mounted "talk" button activates Siri in the TLX. After the Siri chime sounds, the driver can ask a question, set up a calendar entry and more. Siri offers a wide range of capabilities including sending and reading aloud text and email messages, setting alarms and reminders, checking the weather, posting to social media sites and much more. Siri can also find a point of interest, then provide turn-by-turn audio directions when the audio system is set to Bluetooth® audio or iPod mode. The system switches automatically to Bluetooth audio when playing a song or artist.


The 2015 Acura TLX utilizes a newly designed chassis that incorporates next-generation versions of two pinnacle Acura super-handling technologies - Precision All-Wheel Steer™ (P-AWS) and Super Handling All-Wheel Drive (SH-AWD™). Both technologies are engineered to deliver intuitive and precise dynamic capabilities in a vehicle that responds directly and accurately to the will of the driver. These next-generation technologies are anchored by the TLX's rigid unit-body structure and its MacPherson strut front and multi-link rear suspension with Amplitude Reactive Dampers (ARD). Stable and responsive vehicle dynamic behavior is further aided by Acura's Agile Handling Assist (AHA) technology and, in emergency maneuvers, by Vehicle Stability Assist (VSA).

These chassis features help define the TLX as the most advanced Acura ever produced from a dynamic standpoint, a vehicle that supports the needs of the driver in all conditions - quick and responsive in sporty driving environments; stable and sure-footed in emergency maneuvers; calm and quiet during long-distance cruising - all based on the will of the driver.

The TLX also allows a substantial degree of customization through its Integrated Dynamics System (IDS) with four modes - ECON, Normal, Sport and Sport+ settings - that take the TLX from soothing to scintillating all at the touch of a button.

Front Cast-Aluminum and Steel Subframe

In a first for Acura, the TLX employs a cast-aluminum and steel "hybrid" front subframe to reduce road surface vibration and shock inputs for a smoother, quieter ride. The new subframe supports the engine, transmission, front suspension and steering system. The front section of the subframe is steel, and the rear section is cast aluminum. The sections are joined with a newly developed friction-stir-welding process to form a single high-strength, lightweight unit that provides ideal ride and handling properties. Altogether, the front subframe, along with a lower arm hydro-bushing, reduces vertical and fore/aft forces felt at front seats by 61 percent and 46 percent, respectively, compared to the previous TL model.

MacPherson Strut Front Suspension

MacPherson strut front suspension with Amplitude Reactive Dampers provides precise and engaging handling performance, a responsive feel for the driver, and luxurious ride quality. Specially tuned hydro-compliance bushings improve resistance to shimmy and while also reducing brake judder, further improving the TLX's refinement and driving character. All TLX models have a 26.0 mm diameter tubular (hollow) front stabilizer bar.

Rear Steel Subframe

Constructed of high-tensile steel, the rear subframe uses hydraulic mounts, along with increased fitting-point stiffness, to reduce road surface vibration and shock inputs for a smooth ride and low noise. The rear subframe reduces vertical and fore/aft forces felt at front seats by 31 percent and 33 percent, respectively compared to the previous TL model. In addition, on TLX models with Super-Handling All Wheel Drive (SH-AWD), the rear subframe features a 4-point differential mounting system. Its bushing rates are specially calibrated to reduce the transmission of driveline noise and vibration into the vehicle body, while also helping to maintain ride quality.

Multi-Link Rear Suspension

Multi-link rear suspension with Amplitude Reactive Dampers provides optimal handling agility, driver confidence and ride sophistication. Geometry, including rear toe control, is optimized for handling competence, stability and a sophisticated ride in a variety of urban, highway and open road scenarios. The system includes multi-link control arms, control-arm bushings that are optimized for the best blend of noise, vibration and harshness (NVH) isolation and handling precision, and Amplitude Reactive Dampers. Both the 4-cylinder and SH-AWD models have a 24.7 mm diameter rear stabilizer bar, while the front-wheel drive V-6 has a 25.4 mm diameter stabilizer bar.

Amplitude Reactive Dampers (ARD)

Acura's Amplitude Reactive Dampers provide both superior ride comfort and sporty handling, helping the new TLX provide a truly engaging driving experience in all driving situations. Two separate damping mechanisms are utilized, with one tuned for maximum efficiency on smoother roads with small inputs and the other tuned to handle large inputs such as rough roads, potholes, and sudden steering and braking action. Front triple-path damper mounts further improve ride comfort without sacrificing handling. The result is a vehicle that remains composed and comfortable in a wide range of conditions.

The core technology contained within the Amplitude Reactive Dampers is their two separate damping pistons, including a main piston and a second piston. To improve overall ride comfort, when smaller inputs occur during normal driving conditions, only the main piston works to provide the ideal damping characteristics. To improve the TLX's ride and handling during more severe conditions, the second piston operates to provide additional damping force.

Amplitude Reactive Dampers operate on a purely mechanical basis that does not require electronic controls.

Vehicle Stability Assist™ (VSA®)

The TLX's Vehicle Stability Assist™ (VSA®) works in conjunction with the Drive-by-Wire throttle system and ABS to enhance vehicle stability when cornering: If vehicle understeer or oversteer is detected, the system selectively reduces power and/or applies braking force to individual wheels to help correct the condition and stabilize the vehicle.

VSA also supports the functioning of available driver-assistive technologies such as Adaptive Cruise Control (ACC) with Low-Speed Follow (LSF), Collision Mitigation Braking System™ (CMBS) and Road Departure Mitigation (RDM). The advantages of the latest VSA system on the new TLX include quicker response with smoother activation and more accurate control, improved brake-pedal feel and lower operating noise, vibration and harshness (NVH).

In addition, traction control monitors front-wheel slippage, such as when starting on slick surfaces or patches of ice. If slippage is detected, traction control activates one or more brake calipers and reduces engine torque to slow the spinning wheel(s) so traction can be regained.

Integrated Dynamic System (IDS)

ECON, Normal, Sport and Sport+ modes allow the driver to customize their driving experience. The modes are driver-selectable via a console-mounted button and are displayed on the Multi-Information Display located between the tachometer and speedometer. ECON, Normal and Sport are selectable as default, or last used modes, while Sport + defaults to Sport at ignition off, and must be reselected after a restart. ECON mode favors high fuel efficiency, while Normal mode is for everyday driving. Sport mode enhances throttle, EPS and P-AWS response or SH-AWD rear-wheel torque-vectoring control to sharpen vehicle dynamics, while Sport+ mode enhances transmission shift mapping, maximizing performance.

Motion-Adaptive Electric Power Steering (MA-EPS)

The TLX's next-generation Motion-Adaptive Electric Power Steering offers precise direct feel, high energy-efficiency, tunable response and improved active safety. MA-EPS responds instantly to steering input and automatically changes the amount of power assist appropriate to the vehicle's speed. Its idealized steering effort and linearity, excellent on-center feel, minimal torque steer and maximum parking ease provides a satisfying driving experience under all conditions.

Agile Handling Assist (AHA)

Agile Handling Assist (AHA) extends the P-AWS function by using the brakes in cornering to create yaw, or turning motion, helping the driver smoothly and easily trace the desired line with smaller steering-wheel inputs. AHA stabilizes the car earlier than conventional vehicle stability assist systems, resulting in more agile and engaging dynamic performance in everyday driving conditions.

Super Handling All-Wheel Drive (SH-AWD)

The TLX SH-AWD features a new hydraulically-controlled iteration of Acura's acclaimed Super Handling All-Wheel Drive™ (SH-AWD®), which progressively distributes optimum torque not only between the front and rear axles, but also between the left and right rear wheels. Like its P-AWS counterpart, the TLX SH-AWD system is complemented by the brake torque effect of Agile Handling Assist.

The benefits of the SH-AWD system are superior all-weather handling and neutral, accurate steering under power. By rotating the outside rear wheel faster than the front axle while cornering, SH-AWD uses torque vectoring to create a yaw moment to help turn the vehicle through the corner — reducing understeer and improving controllability. With cornering forces more evenly distributed between front and rear tires, overall cornering power is increased — on wet or dry roads.

This next-generation SH-AWD system is 25 percent lighter and utilizes new hydraulic control to overdrive the rear wheels by 2.7 percent (compared to 1.7 percent for the previous system), enabling greater turning forces at reduced speeds and in tighter corners.

4-Wheel Disc Brakes with ABS and Brake Assist

The TLX is equipped with 4-wheel disc brakes with a 4-channel anti-lock braking system (ABS). The pedal feel is smooth and easy to modulate in light braking, and linear and pleasantly low-effort during medium and hard braking. The result is short, confident stops — with excellent pedal feel — under all conditions.

The front discs measure 12.6 inches in diameter, while the rear discs measure 12.2 inches in diameter. Weighing a total of 2.5 pounds less than the previous TL brakes, the lighter-weight TLX brakes help improve ride quality, handling capability and fuel efficiency. The brake pads are a high-friction type to optimize response and peak stopping performance even under strenuous conditions. The brake calipers are designed to reduce brake drag when not in use, reducing rolling resistance and improving fuel efficiency in the process.

The front brakes feature supplemental external vents that provide a second airflow path around the brake rotors, reducing thermal deformation by 51-percent. The byproduct of this better cooling is a 30 percent reduction in brake judder — felt by the driver as steering-wheel and brake-pedal vibration — during aggressive driving.

ABS independently modulates braking power at each wheel to help the driver retain steering control during heavy braking, while Brake Assist recognizes emergency braking situations and almost instantly applies full braking force when appropriate.

6-Piston Brake Modulator

The TLX employs a premium Bosch 6-piston brake modulator that provides the ultra-quick braking response required for Vehicle Stability Assist (VSA), Active Handling Assist (AHA), Low Speed Follow (LSF) operation, Road Departure Mitigation (RDM), and Collision Mitigation Braking System (CMBS). The brake modulator's function is to build braking pressure almost instantaneously, and utilizing six pistons — instead of the two pistons in the previous TL brake modulator — it delivers significantly quicker response than before.

The new brake modulator also includes two additional pressure sensors, which ensure the smoothest possible pump operation. This reduces the potential vibration that might otherwise be felt through the TLX's unit-body and brake pedal, improving overall braking-system refinement to an unprecedented level. In addition, a special Active Noise Shaping (ANS) chip incorporated into the motor controller circuitry measurably reduces noise during brake modulator operation. The operating algorithms of the system are proprietary and developed by Acura engineers.

Electric Parking Brake and Automatic Brake Hold

The combination of Electric Parking Brake (EPB) and Automatic Brake Hold meaningfully reduce the effort of driving the vehicle, thereby raising overall enjoyment and comfort for the driver.

Wheels and Tires

All TLX models have 10-spoke aluminum alloy wheels, with the 2.4-liter TLX models featuring 17x7.5J wheels with black accents, while all V-6 models feature 18x7.5J wheels with gray accents.

All TLX models feature high-performance all-season tires that help deliver an ideal balance of ride and handling, high fuel efficiency, and low noise, vibration and harshness (NVH). The 2.4-liter TLX models are equipped with 225/55R17 tires, and all V-6 TLX models are equipped with 225/50R18 tires.

The wheel bearings are engineered with special low-drag seals that contribute to a 4.4-percent decrease in rolling resistance compared to a traditional wheel bearing seals.

Tire Pressure Monitoring System (TPMS)

A standard Tire Pressure Monitoring System (TPMS) helps the driver maintain proper air pressure to improve driving safety and fuel efficiency, as well as reduce wear and tear on the vehicle's tires. Located in the Multi Information Display (MID), the TPMS graphic indicates the pressure in all four tires on a real-time basis. A TPMS icon illuminates to alert the driver whenever any of the tires has a significantly low-pressure reading that requires the driver's attention.

Fill Assist

Debuting for Acura on the 2015 TLX is a technology called Fill Assist, which helps the driver inflate tire pressures to the correct level without using a pressure gauge. Instead, during inflation, Fill Assist sounds an audible alert when the tire reaches the required pressure.

Tire Repair Kit

The TLX features an easy-to-use tire repair kit in lieu of a spare tire. This reduces weight and increases trunk volume, and simplifies temporary repairs in the event of a flat tire. Acura Roadside Assistance supports tire repairs. In addition, a temporary spare tire is available as a Genuine Acura Accessory.

Capless Fueling System

The TLX's capless fueling eliminates the fuel cap, meaning that fueling the vehicle simply requires opening the fuel lid, refueling, and then closing the lid. This smart and easy-to-use design eliminates the need to touch a dirty fuel cap, reduces the possibility of damaging the vehicle's paint with the fuel cap or tether, or forgetting the fuel cap at the gas station. It also eliminates the possibility of activating an emissions warning by failing to properly re-install the fuel cap. And finally, the capless fueling system allows the use of a smaller fuel-cap door, which cleans up the lines of the vehicle.

The system consists of two integrated components, including an outer shutter mechanism that prevents the intrusion of dirt and dust, and a self-sealing fueling flap that is closed by a torsion spring. Both operate automatically.

At a gas station, the driver simply opens the fuel lid and then inserts the fuel nozzle. Inserting the nozzle automatically opens the outer shutter and fueling flap. When fueling is complete, removing the fuel nozzle automatically closes both the fueling flap and outer shutter.

17.2-Gallon Fuel Capacity

The TLX's plastic fuel tank capacity of 17.2 gallons gives the TLX ample cruising range. The fuel tank is made of high-impact plastic for light weight and durability. The fuel tank is located in a protected area in front of the rear suspension.


As Acura's premier sport sedan, the 2015 TLX offers more power and drivetrain choices than ever before, with two all-new direct-injected engines, two completely new advanced transmissions, and Acura's next-generation precision handling technology - Super Handling All-Wheel Drive™ (SH-AWD®).

The TLX is available in both all-wheel-drive and front-wheel drive layouts. Front-wheel drive models come standard with Acura Precision All-Wheel Steer (P-AWS) and can be equipped with either the 2.4-liter 4-cylinder, or 3.5-liter V6 engines. The TLX SH-AWD, with next-generation Super Handling All-Wheel Drive, is available only with the V-6 engine.

The TLX's two new Direct Injection (DI) engines combine power and efficiency. The 2.4-liter DOHC i-VTEC 4-cylinder engine produces a peak 206 horsepower and 182 lb.-ft. of torque. It has more horsepower and substantially more torque—particularly in the mid-range—than the same-sized engine that powers the TSX sedan. Even though the TLX is larger and heavier than the outgoing TSX 4-cylinder, it actually posts superior EPA fuel-economy ratings of 24/35/281 mpg city/hwy/combined.

A new 3.5-liter direct injected i-VTEC® 24-valve V-6 engine replaces the 3.5-liter and 3.7-liter engines in the TL. The new powerplant gains 10 horsepower (290 peak horsepower) and 13 lb.-ft. or torque (267 lb.-ft.) compared to the 3.5-liter V-6 in the TL sedan. To boost fuel efficiency, Variable Cylinder Management (VCM) automatically deactivates three of the engine's six cylinders under light engine loads. TLX SH-AWD models also add a new automatic idle-stop feature to further improve fuel efficiency.

The front-wheel drive TLX with V-6 and P-AWS has an EPA fuel-economy rating of 21/34/251 mpg city/hwy/combined; the TLX SH-AWD is EPA rated at 21/31/251 mpg city/hwy/combined. Compared to the 2014 TL with automatic transmission, the front-wheel-drive TLX V-6 has a 17-percent increase in EPA highway fuel economy ratings, and the TLX SH-AWD has a 19-percent fuel economy-ratings gain.

To make the most of these powerful, refined and efficient new engines, the TLX features two highly advanced new transmissions. 2.4-liter TLX models have a standard 8-Speed Dual-Clutch Transmission (DCT) featuring Sequential SportShift, the world's first transmission of this type to be paired with a torque converter. The DCT, with its closely-spaced ratios, ultra-quick shifts and automatic downshift rev-matching, gives the 2.4-liter TLX an aggressively sporting feel. The torque converter provides exceptionally smooth operation in stop-and-go situations, plus it offers off-the-line torque multiplication for substantially improved initial acceleration that a DCT alone cannot equal.

3.5-liter TLX models are equipped with an all-new 9-speed automatic transmission featuring Sequential SportShift, which is substantially lighter than the 6-speed automatic in the previous TL. The transmission is engineered to handle the V-6's substantial power output, and its closely spaced gear ratios enhance performance and fuel efficiency. No competitive vehicle in the segment offers as many transmission ratios.

A new generation of Acura's acclaimed Super Handling All-Wheel Drive™ is standard in the TLX SH-AWD. SH-AWD progressively distributes torque not only between the front and rear axles, but also between the left and right rear wheels. Using torque vectoring to help turn the vehicle, SH-AWD creates a more responsive, neutral and predictable platform while providing outstanding all-weather confidence and control. In the TLX, torque-vectoring effectiveness has been greatly enhanced, benefiting responsiveness, agility and stability.

Front-wheel drive models feature the latest version of Acura's Precision All-Wheel Steer™ (P-AWS), which, like SH-AWD, is designed to help give the TLX greater agility and handling balance.

Direct-Injected 2.4-liter Inline 4-cylinder Engine

The TLX's new Direct Injection (DI) 2.4-liter DOHC i-VTEC 4-cylinder engine brings a host of intelligent technology to its segment. The engine's i-VTEC system combines VTC (Variable Timing Control), which continuously adjusts the intake camshaft phase, with Variable Valve Timing and Lift Electronic Control (VTEC), which changes valve lift, timing and duration of the intake valves. A new Direct Injection (DI) system, dual-stage intake manifold and other technologies combine to produce up to 10-percent more torque as compared to the same sized engine that is standard in the TSX Sedan, with greater power available over the entire operating range. Peak power (206 horsepower) is also higher than that of the TSX engine, with the peak arriving at 6,800 rpm instead of 7,000 rpm.

Fuel economy ratings are exceptional, due in part to efficient Direct Injection, a new combustion chamber design, offset cylinder bores and a range of friction-reducing technologies. The TLX equipped with the 2.4-liter engine and standard 8-speed dual-clutch transmission has an EPA fuel-economy rating of 24/35/281 mpg city/hwy/combined. That's a significant increase over the smaller TSX sedan, which was rated at 22/31/261 when equipped with an automatic transmission. The 4-cylinder engine meets ULEV-2 emissions standards in select states, and Federal Tier 2, Bin 5 standards.

4-Cylinder Engine Block, Crankshaft and Pistons

The TLX's 2.4-liter engine has a lightweight die-cast aluminum block with a single main-bearing cradle design that creates a rigid assembly to help minimize noise and vibration. Cast-in iron cylinder liners provide long-lasting durability. Each journal on the forged-steel crankshaft is micropolished to reduce internal friction. To improve smoothness throughout the rpm range and help lower noise levels, the engine is fitted with an internal balancer unit. Consisting of a pair of chain-driven counter-rotating shafts located in the lower block and integrated into the oil pan, the balancing system helps quell the inherent second-order harmonic vibrations that normally impact inline 4-cylinder engines.

To reduce piston-sliding friction, the cylinder bores are offset by 8.0 mm from the crankshaft. This gives the connecting rods a more favorable angle during each power stroke, which reduces side loading on the pistons and in turn, improves efficiency. The engine features a forged crankshaft for high rigidity and low friction. Lightweight pistons have a carefully optimized skirt design to minimize reciprocating weight, and reduced weight minimizes vibration and increases operating efficiency. The piston crowns are dished, to help maintain stable combustion and to optimize distribution of the stratified fuel charge from the direct injector in each cylinder. This close control over the combustion process boosts overall operating efficiency.

4-Cylinder Dual-Stage Intake Manifold

To maximize power output, the 2.4-liter engine has a dual-stage intake manifold has two different intake runner lengths that are selected based on the operating conditions. An actuator and a set of four butterfly valves control the intake runner switching process. At low engine speeds, the long runners are used to improve low-end torque. At higher engine speeds the system switches to the short intake runners for greater high rpm power. The result is intake tuning that is optimized for the engine's entire operating range.

2.4-liter Engine Cylinder Head and Valvetrain

The lightweight cylinder head is made of pressure-cast aluminum alloy, with exhaust passages cast directly into the cylinder head. This eliminates the need for a traditional separate exhaust manifold and allows the close-coupled catalytic converter to be mounted directly to the cylinder head.