The auto stop feature is enabled by default when the car is started. When stopped at a traffic light or in a traffic jam, the auto stop turns off the engine and is supposed to restart when the drivers foot is off the brake. The engine unexpectedly will not restart, and the car must be put in park, turned off, and restarted. This is dangerous in heavy traffic. The dealer replaced the battery as an attempted repair. The problem reoccurred. The dealer then updated the software, which also did not solve the problem. The dealer advised that Honda is aware of the problem and currently has no solution. I was advised to manually turn off the auto stop feature until a solution can be found.

- Merrick, NY, USA

On a few occasions, while at a stop light the auto idle engaged. When I lifted my foot from the brake pedal, which should restart the engine, the car Shifts automatically into neutral and cannot restart the engine. The dash shows a message saying that I must now shift to park. I have to then turn the car off, while in traffic, and then restart. This happens while in traffic, causing everyone behind me to wait or drive around. I have taken this to Acura of Stamford twice already, and they cannot recreate it. I have pictures of the car when it was in neutral. Other people have reported this occurring on a 2019 mdx as well.

- Stamford, CT, USA

I was getting ready to pass a semi and when I went to accelerate I had no power. I pushed the pedal several times with no power. Then it finally kicked in and the car accelerated. I was almost rear ended due to me losing power. This has happened multiple times. No lights ever come on. I am also experiencing the car completely shutting off while stopped. When it does this, a message pops up that I need to shift to park. It takes a few tries and then I can restart the car. I have taken it to the dealership and they can-??t replicate either issue. They told me there are no TSB-??s on these issues. Dates this occurred in 2021: 8/27, 9/9, 10/5, 11/5. Dates this occurred in 2022: 3/4, 3/28, and 4/10.

- Austin, AR, USA

I was stopped at a light and as the light changed to green I began to accelerate to enter the on ramp to 75N. While driving onto the on ramp many warning lights came on as my car shifted into Neutral on its own. I couldn-??t accelerate, switch it back to drive.or depress the break as it was locked. The car stopped and would not move on the entrance ramp to a busy highway. I called 911 because I was almost hit multiple times as I could not move the car. FDOT came to assist and saw that I could not depress the break, remove the emergency break, or get the car to move. After a few minutes we turned the car off and it started back up with no problem. The vehicle had to be towed to the dealer on 3/30/2022. Upon searching on the internet, I saw that this is not a new issue. I could have been killed yesterday while on the phone with 911 on the on ramp to the highway with vehicles approaching at a very high rate of speed and having to slam on their breaks and swerve off the road to avoid hitting me.

- Odessa, FL, USA

I think this recall needs to be expanded: Honda and Acura have recalled 2019 and 2020 vehicles including the CR-V and Accord for fuel pumps which can malfunction and cause the engine to lose power. My wife recently had her 2019 MDX stall on her in an intersection and she had to turn off the car and turn it back on so it would work. It sounds exactly like the below: -??While driving, the vehicle shifts into Neutral, the transmission indicator comes and DTC P0657 (actuator supply voltage circuit/open) is stored. The driver will not be able to select any other gear until the vehicle is turned off and restarted. Update the PGM-FI [programmed fuel injection] software and the TCM software, clear any DTCs [diagnostic trouble codes], and do the PCM [powertrain control module] idle learn procedure.-?? - TSB 15-034 Additionally, May 23, 2021 we had an experience where the same MDX decelerated as we merged into traffic at I-30 and I-820 in Ft. Worth. I let off the accelerator going 60-70 MPH and then stepped on the accelerator to complete my merge and there was no power. Speed dropped to around 20 almost instantly. I had to completely let off the accelerator and depress it again to get going. Very scary situation considering how fast people drive on Texas freeways. These are two big issues Honda/Acura needs to address ASAP as both put consumers at risk of injury and possibly death.

- Dallas, TX, USA

The car caught fire spontaneously in the parking area. We called 911 and the fire brigade took about an hour to get the fire under control. We had gone to chickfila (about 6 miles total distance) and the car had been parked for maybe 5 minutes when we saw a fire engulf the front portion. I put water on it while waiting for 991 response.

- Brownsville, TX, USA

Vehicle goes into 'go limp' when I accelerate or change lanes. Very dangerous situation when passing on a two lane country road (happened twice) and merging onto a highway with a short entrance ramp. This could potentially lead to a major accident and we don't feel comfortable driving this vehicle in these situations.

- Sea Cliff, NY, USA

The contact owns a 2019 Acura MDX. The contact stated that while her husband was driving approximately 55 mph, the vehicle loss motive power and stalled with several unknown warning lights illuminated. The vehicle was restarted and was driven to the residence in limp mode. The vehicle was then towed to pohanka Acura located at 13911 lee jackson memorial hwy, chantilly, va 20151 however, the cause of the failure was not yet determined. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 13,353.

- Ashburn, VA, USA

The engine auto stop or idle stop is a safety hazard. The engine shuts off preventing a quick acceleration from an intersection or other hazard. The manufacture should offer a method to permanently disable this hazard.I was nearly T-boned when trying to make a LH turn at a busy intersection because the car had to start before accelerating

- Louisville, KY, USA

While driving approx. 40 mph and slowing to turn into gas station, the car completely turned off. I was unable to put car in neutral or get off of road. Tow truck called and had to be drug onto flatbed. Garage replaced battery and still unable to start. Needed to replace timing belt, tensioner pulley, water pump, engine short block and heads. Car with only 4088 miles, no S/S of issue prior to incident, etc. Garage not sure what caused issue, best guess is manufacture defect in timing belt. I asked to end lease or for new vehicle, but Acura denied. Car will be returned to me despite my concerns.

- Montrose, PA, USA