2020 Acura MDX Electrical System

There was an active recall on this car from Acura for the auto start system malfunctioning. When the car auto stops at a signal or stop sign it does not turn back on sometimes. We took the car to Acura 3 times for the same issue and they keep saying that it is fixed but the recall was never fixed. This is highly dangerous in traffic situations when the car does not turn back on when you take your foot off the brake.

The contact owns a 2020 Acura MDX. The contact stated that while at a stoplight, the vehicle shut off and failed to immediately restart after releasing the brake pedal. The contact stated that the failure had occurred on several occasions. The vehicle was taken to the local dealer, who diagnosed that the starter needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The contact was informed of the NHTSA Action Number: EA25004 (ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the investigation. The failure mileage was 20,000.

The contact owns a 2020 Acura MDX. The contact stated while coming to a complete stop, the vehicle started to stall. The contact stated that after the vehicle came to a stop, the vehicle would not turn on until after several seconds. There were no warning lights illuminated. The vehicle was stalling more frequently and was taking longer to restart. The vehicle was towed to an independent mechanic and was diagnosed with alternator failure. The independent mechanic could not find any other cause for the failure. The vehicle was repaired; however, the failure persisted. The local dealer was contacted; however, the vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 20,000.

The contact owns a 2020 Acura MDX. The contact stated that upon coming to a complete stop, the vehicle suddenly stalled. After which, the contact became aware that the vehicle briefly failed to detect that the key was present, preventing the vehicle from restarting. After a while, the vehicle was able to detect that the key was present, and the vehicle started. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to duplicate the failure. The manufacturer was not notified of the failure. The failure mileage was 10,000.

While coming to a stop the engine start stop engaged causing the engine to turn off completely and would not restart when the throttle was pressed . The transmission shifted into neutral and the push button start would not fire the engine. Car would not go back to park. After locking and unlocking the door 30 seconds later it reset and the engine refired. This occurred with traffic flowing behind me and caused the car to be placed in neutral and the driver having no control over the vehicle. If this had occurred in an intersection while turning, the driver and occupants of the vehicle could be in significant danger of an accident. I took the car to the Acura dealer the next day and was told they had several complaints of this kind but would need to duplicate the issue on my car to assist me. If they could not duplicate the issue then the could not help me. At this time, it has not been inspected by the manufacturer. There were several warning lamps that came on when the car turned off.

The contact owns a 2020 Acura MDX. The contact stated while stopped at a stop light, the vehicle failed to restart, and the contact became aware the Auto START/STOP function was not operating properly. After manually restarting the vehicle, the vehicle returned to normal functionality, but the failure became a regular failure. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to duplicate the failure. The vehicle was not repaired. After investigating the failure, the contact related the failure to Technical Service Bulletin: 23-008. The manufacturer was not notified of the failure. The failure mileage was 31,500.

Purchased used vehicle from dealership last week who completed the outstanding recalls prior to picking it up. Vehicle only has ~7800 miles. Stopped in traffic for red light, engine idle turned on after applying brake fully and car completely died...would not turn back on and nothing worked, not even hazards which made it a very dangerous safety issue sitting in the middle of a busy street. Police would not wait for call to AAA for free tow due to current safety issue and had it towed to local towing company.

Our 2020 MDX we lease has lost electrical 3x since Sep 1. Once while sitting at a stoplight. Twice while turning at intersection. Each time, there was a complete power loss. When the car was moving, it quickly slowed to a stop in the road. In each case, it took a few minutes to get the car restarted due to being startled at what happened. I checked the battery cables, and they are tight. The radio settings were not lost, so I do not think it was a battery connection failure. We are not sure what to do with this as, while there are a lot of similar reports for acuras, there is no consistent diagnosis.

I was on a bridge heading into a tunnel stopped due to traffic and the car shut off completely. The screen said to put the car in park and restart it. I tried several times and after a few attempts it started back up. This is the third time this happened. I had a recall when I purchased it and had the recall addressed for the same issue. Now I am back at Acura again. And being told I may have to pay for diagnostics. The car is still under warranty.

Car will not restart from the Auto Idle Stop when at a stop light. The dash goes blank then flashes everything and it takes a minute or so to restart. It has happened 3-4 times in the last 6 months. Once on a 55 mph highway. Very dangerous safety issue. I have take it to the Acura dealership service department and they say diagnostics does not show why. However, They said it has happened to their TXL model and a software update was the solution and they are hopeful they will get on update soon. Service associate did say others have been calling in about the same issue. But do not know if Acura is working on a fix. I did report the incidents to the national Acura customer service department and have a case number.