There are 6 owner-reported brakes complaints for the 2020 Acura MDXin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
I was at a red light with the idle stop automatically triggered. When the light turned green, and I pressed the accelerate pedal, the car would not move. I looked and saw the car had shifted itself to N (neutral) when it should have stayed at D (drive). I pressed the "D" button to drive but it stayed in N. There was a green light around the N button indicating the selected button. I had to turn off the car, turn on the car two times before the car recognized I wanted to press the "D" button. The screen by the steering wheel had some sort of message but I don't recall what it said. The word "accessory" might have been part of the message. This is absolutely a safety risk for myself and others. I had cars behind me at the green light honking. I had to turn on the hazard lights and wave to them out the window. If the driver before me did not pay attention, they could have hit me. This is the second time this has happened.
emission system problem & electric parking brake problem codes came up. Once pulled over vehicle would not disengage the emergency parking brake.
My vehicle will phantom brake and kick on the automatic emergency brake system without cause. It has done it as I was accelerating onto the freeway onramp and almost caused a collision with the vehicle behind me. There was nothing in front of me and no reason to brake. It has happened on several occAsions
The contact owns a 2020 Acura MDX. The contact stated while attempting to accelerate from a stop light, the engine did not restart after releasing the brake pedal. While attempting the restart the vehicle, the brake pedal was very hard while depressed. The cause of the failure was not yet determined. The vehicle was previously repaired at the local dealer and a software update was performed but the failure persisted. No further information was available. The manufacturer was not contacted. The failure mileage was 6,000.
The engine idle stop function is unreliable and often fails to restart the engine when the brake pedal is released. The vehicle will, suddenly and without notice, become inoperable and undrivable wherever it rests, whether at a red light or stop sign, in the middle of an intersection while making a left-hand turn, or on an entrance ramp to a highway, causing a dangerous situation for myself and other drivers. It takes several minutes to restart the engine and sometimes must be jump-started. The issue has been reported to my local dealership, and they said it is not covered.
Dealer says two warped rotors Brakes pads are good there has been no abnormal breaking while driving the car. I feel this is a faulty rotor
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026