NHTSA Complaint #11691360 — 2020 ACURA MDX

On multiple occasions, after coming to a complete stop, the engine shut off as designed but then failed to automatically restart when I released the brake pedal or pressed the accelerator. This left the vehicle completely disabled in traffic until I manually restarted it by shifting into Park and pressing the ignition button. This failure is unpredictable, occurs without warning, and poses a significant risk of collision, particularly when stopped at busy intersections or in heavy traffic. I contacted my Acura dealer, who confirmed that this issue is a known concern on 2016–2020 MDX models and that Acura has issued Technical Service Bulletins (such as 23-001 and 23-002) and a warranty extension. However, even after updates, the problem continues to occur, and there is no permanent remedy at this time.