Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2020 Acura MDX owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2020 Acura MDX. The contact stated while driving 30-35 MPH, the accelerator pedal was depressed but the vehicle failed to respond and would not move. There were several unknown warning lights illuminated. The contact stated that after depressing the drive button several times, she was able to drive the vehicle. The vehicle was taken to the dealer who determined that the contact had inadvertently depressed an unknown button on the steering wheel causing the vehicle to shift to neutral. The vehicle was not repaired. The contact stated that the failure recurred while driving. The contact was able to restart the vehicle and drove to her destination. The contact stated the failure persisted. The contact stated that the vehicle inadvertently stalled while driving. Several unknown warning lights illuminated. …
The contact owns a 2020 Acura MDX. The contact stated that while driving, at various speeds, the vehicle hesitated and stalled. Additionally, while driving on several occasions, the vehicle hesitated. There were no warning lights illuminated. The vehicle was taken to the local dealer, but the vehicle was not diagnosed or repaired. The contact called another local dealer, Acura of Valley Stream Service, at 700 W Merrick Rd., Valley Stream, NY 11580, who informed the contact about diagnostic testing. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. . The failure mileage was approximately 56,500. The contact stated that the failure was related to NHTSA Campaign Numbers: [redacted] (Engine and Engine Cooling), and [redacted] (Fuel System, Gasoline).
The contact owns a 2020 Acura MDX. The contact received notifications of NHTSA Campaign Numbers: 23V858000 (Fuel System, Gasoline) and 23V751000 (Engine and Engine Cooling); however, the parts to do the recall repairs were not yet available. The contact stated that the vehicle stalled while driving and came to a complete stop on two occasions. The vehicle was able to restart, and the contact resumed driving. Additionally, the contact stated that the vehicle was difficult to start. There was no warning light illuminated. The vehicle was taken to the dealer, where it was confirmed that the battery was in good condition. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs. The manufacturer was not made aware of the failure. The failure mileage was approximately 25,000. Parts distribution disconnect.
The contact owns a 2020 Acura MDX. The contact received notifications of NHTSA Campaign Numbers: 23V858000 (Fuel System, Gasoline) and 23V751000 (Engine and Engine Cooling); however, the parts to do the recall repairs were not yet available. The contact stated that the vehicle hesitated to start. There was no warning light illuminated. Additionally, the contact stated while driving at an undisclosed speed, there was an abnormal knocking sound coming from underneath the rear of the vehicle. An unknown local dealer was contacted. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs. The manufacturer was not notified of the failures. The approximate failure mileage was 32,863. VIN tool confirms part not available.
The contact owns a 2020 Acura MDX. The contact stated that while the vehicle was idling, the engine suddenly shut off when the driver attempted to accelerate forward. During the failure, the message "shift into park to restart" had displayed. After shifting to the park position the engine was restarted and the vehicle operated as normal. The failure had occurred on at least four separate occasions and one time while attempting to park the vehicle. The contact indicated that the failure had occurred with and without the fuel-saving feature activated. The cause of the failure was not determined. The local dealer was notified. The manufacturer was not yet contacted. The failure mileage was 12,000.
The contact owns a 2020 Acura MDX. The contact received notification of NHTSA Campaign Numbers: 23V858000 (Fuel System, Gasoline) contact however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time. The contact stated while driving at an undisclosed speed, the vehicle stalled with no warning light illuminated. The vehicle was able to restart; however, the failure recurred. The dealer was contacted, and the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 136,000. Parts distribution disconnect.
While driving my 2020 Acura MDX A-Spec at approximately 63,744 miles, the vehicle suddenly lost all engine power without warning while passing through a busy multi-lane intersection. The loss of propulsion prevented acceleration and forced us to coast across traffic lanes to reach the shoulder, creating a significant safety hazard. The engine would not restart. The vehicle was inspected on 3/17/2026 by Lyle Pearson Acura (Boise, ID). The dealership diagnosed catastrophic internal engine failure with the following findings: spun rod bearing in cylinder #6, excessive metal debris in the oil pan, and bearing seizure to the crankshaft. The technician stated the failure pattern is consistent with the rod-bearing defect described in Acura Safety Recall / Service Bulletin 24-001. …
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 have previously filed a NHTSA report # 11533671 with the same issue. Acura has been unable to diagnose and recreate the problem and is refusing to do any further work. It has been brought into their dealership on 3 separate occasions (July 2023, September 2024, August 2025). …
What component or system failed or malfunctioned, and is it available for inspection upon request? - Periodically After Auto Start Stop System activates (vehichle shuts down after stop). When the brake pedal is released and vehicle attempts to restart the engine stalls and is shifted into neutral. How was your safety or the safety of others put at risk? - UNK Has the problem been reproduced or confirmed by a dealer or independent service center? - No, this is an intermittent issue, this has occurred a few times (6). Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? - No, email sent to service department. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? - Parking light, Brake system light, Oil pressure light, battery light.
Auto Idle Mode - After we've stopped and released the brake to go forward, the car will then shift to neutral by itself instead of restarting to drive. This has happened frequently and is now starting to happen more often. This is a safety issue, especially if you're the last car in line and other cars are traveling 55-60 miles behind you on a major road and see a green light ahead. Each time this happens, we have to turn off the car and try to restart the car, and sometimes this has been iffy and we've had to repeat the process a couple of times. There were no warning lights of problems with any of car components. There have been similar reports of this occurring: [redacted]
Related recalls
Fuel system, gasoline › Delivery › Fuel pump
Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX, RLX, TLX, 2019-2022 Honda Insight, Passport, 2020 Honda CR-V Hybrid, 2018-2019 Honda Clarity PHEV, Fit, and 2015-2020 Honda…
Remedy: Dealers will replace the fuel pump module, free of charge. Owner letters were mailed September 6, 2024. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are KGC and KGD.
Fuel system, gasoline › Delivery › Fuel pump
Honda (American Honda Motor Co.) is recalling certain 2019-2020 Acura MDX, MDX Sport Hybrid, RDX, TLX, Honda Accord, Civic Hatchback, Insight, 2019 Acura ILX, Honda Accord Hybrid, Civic Coupe, Civic Coupe Si, Civic Sedan, Civic Sedan Si, Civic Type R, Fit, HR-V, Odyssey, Passport, Pilot and Ridgeline, and 2018-2019 CR-V…
Remedy: Honda will notify owners, and dealers will replace the fuel pump assembly, free of charge. Owner letters were mailed May 18, 2021. Owners may contact Honda customer service at 1-888-234-2138.
Fuel System complaints in other MDX years
Frequently asked questions
How common are fuel system problems on the 2020 Acura MDX?
NHTSA has 23 complaints about the fuel & propulsion system of the 2020 Acura MDX, 10% of the model year's 224 complaints.
Is there a recall for 2020 Acura MDX fuel system problems?
Yes — NHTSA recall 23V-858 (fuel pump, Dec 18, 2023); NHTSA recall 21V-215 (fuel pump, Mar 25, 2021). Recall repairs are free at authorized dealers.
At what mileage do 2020 Acura MDX fuel system problems start?
Half of the complaints with a recorded mileage happened before about 25,000 miles, and 43% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.