Car stalls at idle. Auto Idle does not allow engine to restart from stop. Creating dangerous situations when on highway traffic, traveling around town and more. 2025 MDX, 21,000 Miles Nov 2025 at 14,500 miles reported issue after experiencing intermittently for a few months. Filters replaced, software updated Dec 2025 issue still occurring battery replaced March 2026 issue still occurring starter being replaced Technician at dealership did not seem confident that replacing the starter will remedy this issue.
2025 Acura MDX electrical complaints
Page 3 of 3: complaints 41 to 54 of 54, newest first, as owners wrote them.
There are times when my car comes to a stop shuts off ( auto off) then will not turn back on. This has happened numerous times. The dealers states that this a battery problem
On several occasions, when the vehicle has been driving and comes to a stop in traffic. the auto start stop kills the engine when the brake is fully depressed. When we take our foot off the brake the engine will not start and a notification is shown on the dash. to start the engine push brake and ignition button. When we follow those directions the it does not start the engine. It usually requires us to release brake several times and continue to push start button. This issue has almost caused two accidents because we are stuck and the traffic behind does not see brake lights, because we have to release the brake. This occurred on the interstate in heavy traffic, and was almost struck from behind by a vehicle traveling at interstate speed, because all vehicles went around us and the upcoming vehicle did to see brake lights.
Auto Idle Stop/Auto Start-Stop Issue- On multiple occasions, occurring randomly, the vehicle will not start at stoplights after auto-idle stop is engaged. Sometimes this happens after the vehicle has been running for over an hour. Currently, the vehicle must be completely powered down and then restarted to revive engine.
Autostart (stop/start) stopped engine but failed to restart car. Had to shut down computer and restart computer and then car started. Cars were coming around blind corner serving to avoid us. Has since happened multiple times just starting up vehicle (not involving autostart). Taken to Acura dealership 3 times to fix, but they have been unable to resolve issue.
I was at a red light. My auto idle kicked in. I went to turn it off and Either simultaneously or right before I hit the idle off button my car stalled. It took several attempts to turn back on and a bunch of codes threw. I almost got rear ended. This is a known problem. Ive contacted acura / honda via email as well.
This has happend twice in the past 2 months, I came to a red light and the auto stop/start engaged automatically. When the light turned green and the vehicle was supposed to engage it turned off completely, all lights on the dash came on and it and wouldn't restart. Had to open the drivers side door and try to restart the vehicle, it restarted after a few tries. Very dangerous intersection I was stuck in. I have informed Acura of both occasions, they tested the battery cells and confirmed the battery was okay, was told this is a "known" issue with no resolve.
i purchased the vehicle March of 2025. Since I have been to the dealership on multiple occasions. I was there less than a week after purchase because there was a noise coming from the front tire the dealership balanced the tire. The noise was still there so i returned and the next time they replaced the front wheel bearings. I still have issues with the steering wheel shaking so they replaced all 4 tires. The problem still persists but they don’t know why. the car feels unsafe to drive especially on the highway and in rain. i have had the recall for the brake pin assembly addressed and fixed. I also have issues with the audio shutting off or not responding the dealer did a hard reset and an update to the software that has not resolved the issue. The car would turn off at random times and struggle to turn back on when the idle shut off was activated. the dealer replaced the starter. i have had issues with the car randomly braking when there is nothing in front of me and other safety features either not working at all or working when not needed. dealer advised it was a faulty battery and replaced it. I currently am still having shaking with loud noises especially at higher speed. The engine is very hesitant when accelerating and i struggle to merge onto the highway. It is also extremely jerky at lower gears and its most noticeable in stop go traffic. The brakes are squealing already and the mileage is low. I also sometimes need to press the brakes hard to even stop. The screen often goes black or will not connect to anything and i am unable to see directions or hear music. i feel extremely unsafe in this car and have anxiety every time i need to have anyone in the car with me
2025 Acura MDX Aspec Advanced - Experienced 3 instances of failure to restart after engine idle shutoff or normal shutoff. Periodically starting the vehicle makes a buzzing or resistance type of sound, but usually will start. 1) 8/8/2025 Returning from shopping turned off vehicle in driveway to open hatch to unload items. Upon re-entering the vehicle (~5 mins) the push start failed to start - engine sounded sluggish first attempt and failed to start. Subsequent button presses just made a clicking sound. Had to fully turn off vehicle and back on and it started. 2) 10/10/2025 Returning from a wedding and getting off the expressway to a traffic light the auto stop/idle stop turned off the engine. Once the light turned green the vehicle failed to restart multiple times. Had to fully turn off vehicle and back on to get it to start 3) 10/30/2025 After parking for shopping, upon returning to the vehicle it failed to start from off. Any subsequent repress of the start button would make a click and starter failed to engage. after turning off vehicle and back on it started Vehicle was taken to dealership and notified of issues - they checked the battery and it was fine, no trouble found.
When the auto idle stop system is enabled my Acura will shut down completely when the vehicle comes to a complete stop and the idle stop system will not reengage as it should when your foot comes off the brake and the car shuts completely off and goes into park. This has happened 3 times, the last one occurring on a very busy highway, and I'm thankful I wasn't rear ended by the car behind me. Traffic had to go around me which caused quite a hazard pulling out into a fast moving lane. It finally responded, restarted and I was able to move forward. It was taken into the dealership and they weren't able to recreate the occurrence for the short time that they had it (one week). There was no warning prior to failure. I have called Acura Client Relations and they turned it over to their Management team, gave me a case number and I haven't heard from them as of this complaint. Reading your website I see many others having and reporting this same dangerous experience with their 2025 Acura MDX.
The power and motor on the moonroof and sunshade has failed multiple Times in the first year of owning the car.
When driving and the stopping the auto start/stop feature does not rengage and the car places itself in park and becomes disabled and difficult to restart. When driving on a major highway when I was in traffic the car shut down, put itself into park and would not restart upon removing my foot from the brake. It then gave numerous error messages and would not respond to any commands. Traffic started moving and cars were then needing to go around my disabled vehicle. It finally responded to me trying to restart it. We had the car checked the week before it happened due to it being slow to re-engage when the auto start stop would be used. The dealership reported that there was nothing wrong. Brought it back after is was disabled on the highway for 5 minutes and they are still saying there is nothing wrong if they do not see it happen themselves. It is a danger to drive.
While driving in traffic, my vehicle suddenly shut down without warning. The engine stalled, and I lost power to steering and braking, creating a serious safety risk for myself and other drivers around me. The problem has occurred more than three time. At the time of the failure, there were no warning lamps a message display showing to continue to drive depress brake pedal and push switch there was no check engine light showing. I had to shut the whole car off open the door and re start the car. The issue has been inspected on 08-13-25 by a acura dealer / mechanic. I was told it was the battery and it was covered under warranty. They found no other issues. The car shut down on me again on 08-19-25 and on 08-30-25 with my family in the car. This unexpected shutdown placed me in danger of a potential collision, and I am concerned that this may indicate a larger defect affecting this vehicle. I can get a receipt from the acura service department if needed.
The car sometimes brakes on its own, and sometimes it brakes more or less than normal. Also, sometimes when I try to turn it on, it struggles to do so.
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