2020 Acura MDX electrical system problems

Related recalls

No recalls on file.

What owners say

1. Filed Aug 24, 2026CADriver Assistance & Safety TechElectrical SystemOther / Unknown

   Multiple errors Lane departure and advanced driver support, ACC LKAS, auto high beam, and braking system. Looking into this more i see lots of people with the same issue failing front facing camera and not a cheap fix. Is there any current investigations into this problem or a software upgrade? I clear the errors and they come back once car is turned off and back on. If no fix to the current system there should be a way to disable LKAS and ACC without spending $2000 to…

   NHTSA complaint #11759085 · source
2. Filed Aug 14, 202648,300 miOHElectrical SystemEngine

   The contact owns a 2020 Acura MDX. The contact stated that on six occasions the vehicle stalled and failed to restart immediately. The contact stated that while the idle button was on, the failure occurred. The contact was concerned about being in a crash. The vehicle was taken to the local dealer, where it was diagnosed, and two batteries were replaced, and a software update was performed. The dealer would be checking the software to be sure that it was operating as…

   NHTSA complaint #11757014 · source
3. Filed May 30, 2026CODriver Assistance & Safety TechElectrical System

   My cruise control, automatic lane changing indicator light indicator, brake indicator light, high beam light indicator lights all keep coming off and on. Researching it on YouTube states that it’s the camera on my windshield getting too hot and it’s a known issue. It’s $1800 To fix but others have stated they get fixed and it doesn’t resolve the problem. Asking for your help.

   NHTSA complaint #11741032 · source
4. Filed Mar 8, 2026MDElectrical SystemEngine

   During the summer of 2025, the auto idle engine railed to restart while at a stop light. We had to shut off and restart the car. We took it to the car dealer and they did some sort of software update. It happened again in January 2026 while at a stop light off a highway exit ramp. We took it to a different dealer because we were living in a different city at the time. In their computer system, they could see the repair that had been done. They did some sort of other update…

   NHTSA complaint #11722797 · source
5. Filed Jan 22, 2026NJBrakesElectrical SystemTransmission & Drivetrain

   The following issues occur on a 2020 Acura MDX with low 50k miles, maintenance was done regular whenever a maintenance schedule appear. For the past few years after purchasing the vehicle we started getting a non-start engine with the key fobs and automatic side mirrors did not open or close when parked. Brand new batteries were replace for the key fob and later the Car Battery and the issue occurs intermittently, this was brought to the attention of the dealership and each…

   NHTSA complaint #11712781 · source
6. Filed Dec 27, 2025ILElectrical SystemLighting

   Intermitted Flashing Dash Lights, Headlights, and Car Alarms. Steering wheel moving up and down. Looks like the same issue as Service Bulleting 21-055.

   NHTSA complaint #11707264 · source
7. Filed Nov 8, 2025UTBrakesDriver Assistance & Safety TechElectrical System

   Electric parking break and emissions light keep popping up. They says it’s the catalytic converter many people having the same issue

   NHTSA complaint #11698353 · source
8. Filed Oct 14, 2025CAElectrical 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.

   NHTSA complaint #11693436 · source
9. Filed Sep 17, 202520,000 miNYElectrical System

   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 complaint #11687827 · source
10. Filed Aug 10, 2025NJElectrical SystemEngineFuel, Hybrid & EV Propulsion

    On Aug 8th at 3:32pm (81F and sunny), I stopped at a red light with the auto idle engine feature on. When I lifted my foot off the brake to drive the car, the car shifted into neutral and completely shut down and would not restart immediately. I attempted approximately 8 times to restart the car for 3 minutes before it successfully restarted. This poses a significant safety hazard for myself, my children, and others on the road. This is the 6th time this has happened and I…

    NHTSA complaint #11679634 · source
11. Filed Jul 19, 2025NCElectrical SystemEngine

    I own a 2020 Acura MDX. On two separate occasions, the Auto Engine Idle Stop system failed to operate while depressing the accelerator pedal while at a stop. Several unknown warning lights were illuminated on the instrument panel. The vehicle shuts off and the I had to manually restart the vehicle after the failure. I have not contacted the dealer yet but based on what I have found here I am not the only one that this is happening too. It is awful to be stopped in rush hour…

    NHTSA complaint #11674784 · source
12. Filed Jul 8, 202544,000 miNYElectrical SystemEngine

    The contact owns a 2020 Acura MDX. The contact stated that on three separate occasions, the Auto Engine Idle Stop system failed to operate while depressing the accelerator pedal while at a stop. The contact stated that several unknown warning lights were illuminated on the instrument panel. The contact stated that the vehicle shut off and the contact had to manually restart the vehicle after the failure. The contact called and informed the dealer of the failure. The contact…

    NHTSA complaint #11671981 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology