Some Acura RDX And MDX Owners Have A Troubling Problem

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They're also suing the automaker.

We all remember Toyota's unintended acceleration debacle and the lawsuits and terrible publicity that followed. The Japanese automaker, which long had a reputation for reliability, has since put the issue behind it but only after paying out millions in settlements. But now there's another Japanese luxury automaker being sued by a group of owners over deceleration problems.

According to Car Complaints, a class-action lawsuit has been filed by a group of Acura MDX and Acura RDX owners claiming their vehicles suffer hesitation when accelerating because of defects that have existed since the day they rolled off the production line. The lawsuit includes owners and lessees of the 2016-2020 MDX and 2019-2020 RDX SUVs, which also happen to be two of Acura's most popular models.

2017-2018 Acura MDX Front Angle View Acura
2017-2018 Acura MDX Rear View Driving Acura
2017-2018 Acura MDX Pedals Acura

The former has been Acura's best-seller in the US for the past few years. The lawsuit states these SUVs suffer from sudden rapid deceleration, stalled engines, and even hesitation while accelerating. There have even been alleged cases where the transmissions shifted into Neutral while driving.

The most likely cause for all of this is technical rather than mechanical. There's a miscommunication between the vehicles' computers and software, which controls the engine, throttle, and transmission. The throttle-by-wires systems, in other words, are not functioning properly. Therefore, the lawsuit claims the MDX and RDX are defective and dangerous to drive. Has Acura known about this issue? Allegedly, yes, but has done little to nothing to fix it even though some MDX owner complaints date back to 2016.

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2019-2020 Acura MDX Dashboard Acura
2019-2020 Acura MDX Infotainment System Acura
2019-2020 Acura MDX Side View CarBuzz

One plaintiff leased a 2019 MDX and almost immediately it began suffering from deceleration problems. A trip to the dealership resulted in the brake booster and rear differential being replaced. Despite taking four weeks to complete, the repairs failed to resolve the issues. Another owner who has a 2020 RDX claimed similar problems but the dealership denied there was anything wrong. One dealer, however, ran a system diagnosis on a 2016 MDX and determined that the transmission control module was bad.

So, what happens next? The lawsuit was filed only earlier this month and Acura will have to respond soon. Depending on how the investigation goes, there could be a recall in the near future.

2019-2020 Acura RDX Right Front Three Quarter View Acura
2019-2020 Acura RDX Right Rear Three Quarter View Acura
2019-2020 Acura RDX Frontal Aspect CarBuzz
2019-2020 Acura RDX Side View Internal Front Space Acura
2019-2020 Acura RDX Steering Wheel CarBuzz
Source Credits: Car Complaints

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