2025 Acura MDX power train problems
This is a safety-related system. If you notice symptoms, stop driving and have it inspected.
What owners report
“The contact owns a 2025 Acura MDX. The contact stated upon coming to a complete stop at an intersection downhill, the engine turned off while the instrument panel and infotainment center remained operable. The contact was unsure if the engine Auto START/STOP system was engaged during the failure. The message "Shift to Park" was displayed. The contact attempted to shift to park(P), to turn off and restart the vehicle, but the vehicle failed to respond. The message "Transmission Error-Take to Acur…”
NHTSA complaint · filed 10/26/2026
“My 2025 Acura MDX completely stalled in active roadway traffic and failed to restart. The failure occurred during a routine stop in traffic, tied to the Auto Idle-Stop / restart sequence: when releasing the brake pedal to accelerate, the engine did not restart, leaving the vehicle completely dead and stranded in the travel lane, creating a severe risk of a rear-end collision. I brought the vehicle to an authorized Acura dealership for repair. The dealership diagnosed the issue and replaced the …”
NHTSA complaint · filed 09/26/2026
“The auto shutoff and restart system has failed multiple times causing the car to shutoff in the middle of traffic. This has happened in traffic on the interstate, on surface streets and in the drive thru line. Safety was put at risk as had to restart car in middle of traffic multiple times; once car would not restart at stop light. This could have caused an accident as vehicle was at a full stop with cars coming up from behind in the road. Dealer has replaced starter and relay twice. In le…”
NHTSA complaint · filed 08/30/2026
“My 2025 Acura MDX suffers from a severe safety defect regarding the Auto Idle Stop (auto start-stop) system. When the vehicle comes to a complete stop at intersections or traffic lights, the engine shuts off as intended. However, upon releasing the brake pedal to accelerate, the engine completely fails to auto-restart.Instead of restarting, the vehicle drops out of the auto-restart sequence entirely, shifts itself out of drive, and displays a critical safety message on the dashboard: "To start e…”
NHTSA complaint · filed 08/25/2026
“No restart after auto idle stop - Car fails to restart automatically after stop and releasing the brake pedal. This has happened on a number of occasions in the last few months.This can cause a dangerous condition that can can cause an accident if stopped in an intersection or a rear end collision as the driver behind assumes the vehicle will move but does not. Car has to be shut off to restart.”
NHTSA complaint · filed 06/28/2026
“The auto start/stop system failed to restart at a stop light. This was an issue on the older MDX and TLX vehicles with the 3.5L V6 which resulted in a large recall. The recall has not been extended to cover the 2025 MDX and the dealership is refusing to fix the issue or acknowledge it despite having a video to prove it occurred. Acura is knowingly selling these vehicles with a dangerous safety defect that will occur at random. Please consider investigating this matter further as I am concerned f…”
NHTSA complaint · filed 08/06/2025
Unverified owner reports from NHTSA's public complaint database.
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- How common are 2025 Acura MDX power train problems?
- 6 owners reported power train issues to NHTSA for the 2025 Acura MDX. Counts scale with how many were sold.
- Is there a recall for 2025 Acura MDX power train problems?
- No matching recall is on file. Check your VIN at nhtsa.gov/recalls for the latest.