Acura TLX

The Acura TLX is a series of luxury compact executive car sold by Acura, the luxury division of Honda, since 2014. It is the successor to the TL and TSX models. As of 2021, the discontinuation of the Acura RLX full-size executive flagship sedan has pushed Acura to completely redesign the TLX model for 2021 in order to enlarge the model with the purpose of directly compete against other mid-size luxury executive models like the Lexus ES. Before 2021, the TLX was significantly smaller than most mid-size executive competitors – the increase in size was accompanied by a price hike.
Design history.
The Acura TLX was first shown as the "TLX Prototype", a sedan designed in Acura's Los Angeles Design Studio, as a replacement of the TL and TSX sedans. The production version was unveiled in April at the 2014 New York International Auto Show. Sales began in August, the TLX entered production during July at Marysville, Ohio, United States.
First generation (UB1–4; 2015).
Two powertrain options are available. A 2.4-liter four-cylinder DOHC i-VTEC engine with direct injection was offered with front-wheel drive only, mated to a dual-clutch transmission and all-wheel steering (P-AWS). This model's chassis code is UB1. The Honda designed dual clutch transmission is the first to use a torque converter, which absorbs transmission gear shift shock, thus reducing NVH. The engine is rated at with an EPA-estimated fuel economy of 24/35/28 mpg (city/highway/combined) compared to 22/31/26 from the previous TSX. Honda estimates that the six-cylinder model is 1.5 seconds faster from 0 to 60 mph.
A 3.5-liter direct injected SOHC VTEC V-6 with cylinder deactivation (VCM) is mated to Honda's first time use of a 9-speed automatic transmission (sourced from ZF), available with either P-AWS or all-wheel drive (SH-AWD). The SH-AWD system uses hydraulic clutches instead of the electromagnetic clutch packs found on the previous TL which significantly cuts weight, size and cost. The engine is rated at and front-wheel drive models deliver 21/34/25 mpg while all-wheel drive models are rated at 21/31/25 mpg. Model codes are UB2 for the front-wheel drive and UB3 for the SH-AWD, which comes standard with a "Technology Package". TLX models configured with the V6 engine lose nearly compared to the FWD TL, and over compared to the SH-AWD TL.
Like the RLX and MDX, the TLX comes standard with LED headlamps, with amber LED turn signal indicators incorporated into the side mirrors and rear LED brake lamps. Overall length compared to the previous TL was reduced by while the wheelbase maintains the same length. As with the 9th generation Accord, the TLX loses the front double wishbone suspension of the TSX and TL in favor of a MacPherson strut arrangement, and loses the TL's all-aluminum front subframe in favor of a lower cost friction stir welded aluminum and steel piece.
To significantly cut down on interior noise, triple door seals are used as well as additional sound insulation.
Facelift (2017).
Acura unveiled the revised 2018 TLX in April 2017. Changes include revised front fascia, fenders, and grille, restyled wheels, and new infotainment features including Apple CarPlay and Android Auto support. Additionally, a new 'A-Spec' performance trim has been added. Newly introduced features include an optional 360° surround camera and power driver's seat thigh extension. US sales began during June 2017.
In April 2017, an extended-wheelbase version specifically developed for the Chinese market was announced. It debuted in August 2017 at the Chengdu Motor Show and is called the Acura TLX-L. The TLX-L is only offered with the 2.4-liter four, producing and receiving the UB4 model code.
Safety.
TLX safety features include Lane Keeping Assist System with Road Departure Mitigation System, Adaptive Cruise Control with Low-Speed Follow, Blind Spot Information System, Tire Pressure Monitoring system with Tire Fill Assist, Collision Mitigation Braking System, and Vehicle Stability Assist. There are 7 airbags, including a driver's side knee airbag.
Second generation (2021).
Based on the Type-S concept introduced in 2019, the second generation TLX launched digitally on May 28, 2020, production began on August 28, with sales following on September 28. A Type-S model with a new turbocharged 3.0-liter DOHC V6 engine marks the return of the variant after a decade-long hiatus, with sales starting on May 28, 2021. Without a direct replacement for the discontinued RLX, the TLX will serves as the flagship Acura sedan, slotting above the ILX. The Type-S is scheduled to go on sale in the spring of 2021. The four-cylinder TLX's model code is UB5 for front-wheel drives, UB6 for the SH-AWD model.
Built on its own new platform, the TLX uses a front double wishbone suspension with forged aluminum lower control arms, mounted to cast aluminum damper towers and an aluminum subframe. To increase front suspension rigidity, a steel tubular strut bar connects the front damper towers together, with two additional bars tying each tower to the cowl in a triangular arrangement. Included on higher trims is a front subframe lower tie bar. To further reduce weight, the front fenders are aluminum, with the AGM battery moved to the rear to improve weight distribution.
In total, 64 percent of the body structure's mass is comprised from high-strength steel (HSS) and aluminum, with 1500-MPa steel making up 10.1%. To further increase body rigidity a larger center tunnel, reinforced lengthwise with 980-MPa grade steel is used. A single-piece rear bulkhead steel stamping improves body rigidity without the rear seat brace found on previous TL models, allowing for a folding rear seat trunk pass-through. An underbody triangular brace is added to stiffen the rear suspension on AWD models.
An electric-servo brake-by-wire system similar to the second generation Acura NSX replaces the hydraulic brake, with Type-S models adopting four-piston Brembo front brake calipers.
New options include adaptive dampers, a 10.5-inch head-up display (HUD), a 17-speaker audio system with four ceiling mounted speakers, open-pore wood, and 16-way power full grain leather front seats with four-way lumbar adjustability as introduced on the third generation RDX.
Safety.
To improve passenger safety in frontal oblique collisions, a front passenger three-chamber airbag, co-developed with Autoliv, is standard, and the ACE structure has been upgraded. The new airbag marketed as a "catcher's mitt" is designed to "catch" the occupant's head in the event of an oblique collision. During an impact, uninflated side panels help guide the occupant's head in the direction of inflated chambers acting as a "catcher's mitt." To disperse crash forces more effectively, two tunnel caps made from 780-MPa steel originate from the lower dash and end behind the front seats to direct crash loads away from the lower foot compartment.
The 2021 TLX was named an IIHS Top Safety Pick+, scoring good ratings in all six of the Institute's crashworthiness tests. The 2021 TLX comes standard with safety features such as adaptive cruise control, automatic emergency braking, and lane keeping assist. New for the 2021 model year is Traffic Jam Assist, which helps keep the car moving in stop-and-go traffic without the need for accelerator or brake inputs from the driver.
Motorsports.
A TLX-GT race car version of the TLX SH-AWD, with a twin turbo version of the direct injection V6 engine found in the production TLX SH-AWD sedan, has also been developed by the Acura Motorsports Group at Honda Performance Development. It has a modified chassis and aerodynamic performance parts approved for Pirelli World Challenge competition. The TLX-GT was unveiled at the 2014 North American International Auto Show.
RealTime Racing entered a factory-backed car in the GT class at the Mid-Ohio and Sonoma rounds of the 2014 Pirelli World Challenge, with Peter Cunningham claiming a best result of 13th place. In 2015 the team fielded two full-time entries for Cunningham and Ryan Eversley; the latter won the first St. Petersburg race and finished sixth in the GT class drivers classification, whereas Cunningham finished 14th. Eversley continued as a full-time driver in 2016, winning the two Road America races. Cunningham raced the first half of the season, claiming a runner-up finish at Road America race 1, then Spencer Pumpelly took his place for the last three rounds.
The TLX-GT was replaced by the Acura NSX GT3 in 2017.