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530,000 Hondas, Acuras under expanded NHTSA investigation for steering problem

Earlier this year, the National Highway Traffic Safety Administration opened an investigation into the 2022 and 2023 Honda Civic. The agency had received 145 complaints from owners stating that the car suddenly exhibited “sticky steering” and increased steering effort. WeÂ’re now learning that the investigation is expanding to include hundreds of thousands more cars. The original probe included around 238,000 Civics, but the NHTSAÂ’s latest report, issued Friday, noted that the investigation is expanding to include more than 530,000 Hondas and Acura vehicles. The 2022 and 2023 Honda Civic, 2023 Honda CR-V, and 2023 Acura Integra are affected. A drastic increase in complaints drove the expansion, as the NHTSA said it had received 1,300 reports and was aware of at least 14 crashes related to the problem. An alarming 11 of those crashes involved a roadway departure due to loss of steering control. Two of them came after the driver allegedly overcorrected, and there are three known injuries from the crashes. NHTSAÂ’s report found that the problem happened primarily in the winter months and after the car had been driven in a straight line for an extended period to warm up the vehicle and gear. Though alarming, itÂ’s worth noting that this investigation has not yet reached the recall stage. Honda acknowledged the problem, noting that it was a manufacturing issue for the steering gear unit. The manufacturing process created conditions that could cause greater internal stress, which can wear and deform the gears inside the steering component. The NHTSA also found that the factory did not guarantee consistent lubrication throughout the gear, which could be the cause of the temporary increase in steering effort. The automaker directed its dealers to replace the electronic power steering gearbox to correct a manufacturing defect, but NHTSA will continue its process, moving to an engineering analysis. If that study finds a defect, it could request a recall. Government/Legal Acura Honda Safety

2020 Acura NSX Suspension Deep Dive

The Acura NSX has been a special car as long as I’ve been in the business. The first one came out in 1990, the same year I started my career in automotive engineering. I vividly remember driving one briefly back then when we brought one in for benchmarking. I'd drive it again 22 years later when my previous employer bought a used 1991 example for a long-term test. Reader interest was sky-high and the car was still gorgeous, but the march of time and automotive engineering had clearly left it behind. Then, in 2016, a second-generation NSX emerged, and it was packed with bleeding-edge thinking. It has a 3.5-liter twin-turbo V6, but this new NSX is a hybrid with an electric motor-generator sandwiched between the engine and its nine-speed DCT transmission. Two more electric motors – one for each wheel – power the front axle. There they can add traction, regenerate electricity under braking and dole out hyper-accurate levels of torque vectoring. The carÂ’s tire package was changed from Continental SportContact 5 to SportContact 6 tires in 2019, and numerous suspension re-tuning tweaks came along with them. The result is a lively and well-balanced car that is relentless when driven hard and a pussycat around town. LetÂ’s see what theyÂ’ve got going on under there.   At first glance the 2020 Acura NSX appears to have dual wishbone front suspension. But we canÂ’t tell for sure because that big two-piece brake rotor is in the way. The coil-over shock looks obvious, but a few odd details are apparent even from here.   This view also seems to indicate double wishbone suspension. But the pivot axis (green arrow) between the upper and lower ball joints looks wrong – itÂ’s far too vertical. WeÂ’re missing something. But I would be remiss if I failed to point out a few other things before we moved on. For one, the front drive axle confirms this to be an all-wheel-drive machine. Second, the forged aluminum damper mounting fork (yellow) that envelops the axle is mounted to the lower arm about 75% out from the armÂ’s inner pivot. The spring and damper motion ratio would be 0.75-to-1 relative to wheel movement, with a tiny reduction due to its lean angle. Lastly, just look at the huge cast aluminum upright (white). Beautiful. Normally these are called hub carriers or steering knuckles, and I use the terms interchangeably. But the motorsports-derived term upright is normally applied when the piece is tall and, well, upright like this one.   This explains everything.

Acura builds 345-horsepower RDX A-Spec for SEMA

The 2019 Acura RDX is great — a return to form for the sporty compact luxury crossover. So there's no real harm in giving one the SEMA treatment, especially since it entails a real motorsport tie-in and some legitimate performance parts. As for the giant graphics, well, it's SEMA after all. Graham Rahal races for Honda in the IndyCar series, and he also has his own performance parts company — named, sensibly enough, Graham Rahal Performance — which he started in 2017. They sell some private-label bits manufactured by other companies to their spec, some off-the-shelf parts, and they do tuning and installation work on customer cars. Acura gave the job of building the SEMA RDX to Rahal. There's a fair bit going on under the hood to get the RDX to 345 horsepower from the factory 272 ponies. The 2.0-liter turbo engine gets a bunch of enhancements. The turbo, intake, exhaust manifolds, downpipe, and cat-back (a GRP design) are all aftermarket. There's a customer intercooler, too. KTuning did the ECU with a custom map. On the handling front, the RDX wears Eibach springs, StopTech brakes, HRE wheels at 21 inches, and Michelin Pilot Sport 4S tires. The RDX started life as an A-Spec model in Apex Blue Pearl, and from there GRP applied carbon fiber garnish to the mirrors, grille accents, and lower fascia. Troy Lee Designs did the exterior graphics, and inside there's more carbon fiber and a custom steering wheel (courtesy of Max Papis's MPI Innovations shop). The RDX will be on the show floor if you'd like to check out the Rahal shop's handiwork. Related Video: