2020 ACURA MDX Complaints

Engine seized multiple times. Completely broken now. Online it says many people have these problems.

My 2020 Acura MDX has experienced repeated Auto Idle Stop system malfunctions. When the system activates at a stop, the engine shuts off and does not return to normal operation as expected. The incidents are becoming more frequent and create a safety concern when the vehicle is stopped in traffic. This problem has been reported by telephone on multiple prior occasions. The 12-volt battery has also been replaced multiple times because we believed the battery was causing the problem, but the condition has continued.

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 replace the system.

The contact owns a 2020 Acura MDX. The contact stated that while driving approximately 35 MPH, there was an abnormal knocking sound coming from the vehicle before the vehicle stalled. The vehicle failed to restart. The maintenance warning light was illuminated. The contact stated that the failure was associated with NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling). The vehicle was towed to the residence. The local dealer was contacted to schedule an appointment, but the vehicle had not been diagnosed or repaired. The manufacturer was not contacted. The approximate failure mileage was 60,541.

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 intended. The manufacturer was contacted, and a case was opened. The manufacturer provided a refund for the battery. The failure mileage was approximately 48,300.

Engine turns off while in drive or stopped at a red light/stop sign. It has happened 7-10 times withing the last couple of months, but 3-4 times within the last week. Out of the four times it happened, my family's safety was at risk, because the car was in drive, and could've caused us to get into an accident. During the other occasions, we were moving in reverse and stopped at a stop sign. Complaint was made with Acura of Bay Shore in Long Island, NY, at which time an update of computer engine was performed but issue wasn't fixed due to back-order part that needs to be replaced. Unfortunately, just yesterday (August 13, 2026) car turned off at light causing a road hazard to vehicles and my family stuck in a large intersection. Multiple engine lights turned on, but I was unable to turn the car on or move it. approximately 10 min later, I was able to turn the car on and move it to safe location. I spoke to Acura of Bay Shore, and it is a known issue but till this date, isn't fixed. Vehicle is a hazard and can cause serious bodily harm/or death. thank you

While driving on a residential street under normal daylight conditions, the forward collision warning and automatic emergency braking system failed without warning. A dashboard message appeared instructing me to clean the windshield and stating that collision avoidance services were unavailable. The windshield was clean and unobstructed. There was no precipitation, glare, or debris. The failure occurred while the vehicle was in motion. I had no indication of whether the vehicle was safe to continue driving or whether I should stop immediately, and no way to know whether the fault was limited to the camera or whether other systems were affected. There was no prior warning, no gradual degradation, and no fault indication before this event. I purchased this vehicle in part for its advanced driver assistance systems and rely on forward collision prevention in daily driving. That protection is now unavailable, and I am driving without a crash avoidance system I was sold and expected to have. I took the vehicle to an authorized dealer for diagnosis. The dealer determined that the forward facing camera module must be replaced and recalibrated, and quoted $2,700. No recall or technical service bulletin was identified. I believe this constitutes a safety defect. A primary crash avoidance system failed spontaneously under normal operating conditions on a vehicle marketed on its safety technology. The repair cost is also high enough that many owners will defer or decline it, leaving vehicles on public roads with disabled collision avoidance. I request that NHTSA investigate the failure rate of this camera module and consider a safety recall.

A federal safety recall was performed on the vehicle to install a rear subframe reinforcement kit. Before the recall repair, the vehicle operated normally and had no vibration at highway speeds. Immediately after the recall repair, a new vibration developed above approximately 60 mph. The vibration is felt primarily from the rear of the vehicle, occurs only while accelerating, becomes most noticeable between 60 and 80 mph, and disappears immediately when the accelerator is released while maintaining the same speed. The condition is repeatable and remains unresolved. The vibration creates concern for loss of vehicle stability and control at highway speeds because it occurs while the drivetrain is under load. No warning lights or diagnostic messages appeared before or after the repair. The vehicle has been inspected by both the dealership that performed the recall repair and an independent repair facility. To eliminate other possible causes, the front hub and bearing assembly were replaced and all four tires were remounted and dynamically balanced. Those repairs did not eliminate the rear vibration. The dealership attributed the condition to unrelated maintenance items, including tires, wheels, and brakes, but did not identify a defect with the recall repair or determine whether the rear subframe installation, rear differential mounting, driveshaft, or other components disturbed during the recall procedure contributed to the new vibration. The timing of the failure is significant because the vibration began immediately after completion of the federal recall repair and was not present beforehand. The component is available for inspection upon request. I am requesting that NHTSA investigate whether the recall remedy or repair procedure may have introduced a drivetrain or rear suspension condition affecting vehicle safety.

The car had several warnings lights come on and immediately stalled out and stoped right in the middle of the road. The engine would turn over but would sputter like it was out of gas and would die after a few seconds. It stoped in the middle of a busy state highway in a curve. Luckily no one got hurt. I towed it to an auto service center. The 2020 Acura MDX suffered an in-tank fuel pump failure causing a low fuel pressure code (P0087). This model year is under a massive 2.6-million vehicle safety recall, but my specific VIN was omitted. It likely should be included before someone gets hurt.

The contact owns a 2020 Acura MDX. The contact stated that while driving approximately 20 - 25 MPH, there was an abnormal knocking sound coming from the passenger’s side of the vehicle. The contact stated that the check engine warning light and other unknown warning lights were illuminated. The vehicle stalled and was towed to dealer to be diagnosed. The dealer determined that the engine had seized. The contact associated the failure with NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling); however, the VIN was not included. The manufacturer was made aware of the failure. The failure mileage was approximately 104,000.