2021 Ford Mustang Mach E: sudden unintended acceleration

Filed Oct 3, 2026 · Brakes, Steering · NC · crash

I was involved in a car accident on the XXX I was in the turn lane and a second vehicle hit my driver side, spun me around, and I ended up facing the opposite direction. What occurred next is my safety complaint. The vehicle continued to travel forward and, in fact, accelerated and I was unable to turn or stop in spite of hitting the brake. It caused me to hit a third vehicle and I stopped short of a gas line. There was a recall on this vehicle 22S29. The issue was a functional safety monitor software fault which potentially caused unintended acceleration, unintended deceleration, or unexpected movement I purchased the car in 2023. The recall was dated May of 2022 and was noted on the market valuation report / supplemental information. I was not aware of this recall and I do not believe the issue had been corrected prior to purchase in spite of being told that all recalls had been addressed prior to my purchase. Luckily, nobody was severely injured. I sustained chest wall contusion from the airbag, possibly rib fracture(s) and sternal fracture. My grandson who was [XXX] old was in the backseat and he was not injured luckily but was very traumatized. There were no warning signs. There was a police report but no ticket. The car was totaled so it is not in my possession at this time. The auto dealer that had performed several recall issues for me after my purchase did not have any record that this particular recall had been addressed. I have filed a complaint with Ford as well. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 25, 2025 · Acceleration, Driver assistance · NY

When in cruise control, any speed, car suddenly accelerates This happens while driving, or sometimes after stopping and then resuming previous set speed. For example I was driving in cruise control at 38 mph, when the car suddenly sped to 50mph. Or when on a highway, driving at 55mph, the car suddenly accelerated to 70mph. Started about 3 weeks ago.

Filed Aug 25, 2024 · Acceleration · OR · crash

When stopped at a stoplight, in unbridled mode with one pedal driving engaged, the car surged forward on it's own. The surge forward caused my vehicle to rear-end another vehicle. I would assume the failure was the one pedal driving system and it is available for inspection. The problem has not been reproduced or inspected yet, but we have an appointment for a Ford dealer to evaluate the car. The only warning was the pre collision warning which did go off.

Filed May 8, 2024 · Transmission · FL

After reversing, I changed the gear to drive and then the car suddenly accelerated and continued doing so. I was about to crash into another car until I pressed the brake when the car came to a stop. This is the second or third time this has happened with the most recent instance being most concerning as the speed was increasing with time. I did not have my foot on the accelerator during this time nor was the car in cruise control.

Filed Nov 9, 2023 · Acceleration · MI

There is a software problem which was introduced in a previous OTA which causes drive modes to change. These drive modes are Whisper, Engage, and Unbridle. Each has their own acceleration/throttle response characteristics, as well as steering and suspension feel. You also have the ability to enable one-pedal drive in the drive mode menu. The software bug will randomly throw an error on the main screen that says "Drive Mode Not Available" change your drive mode from Whisper or Unbridle to Engage, affecting the throttle response that can occasionally lead to unintended acceleration. On occasion, it can also lead to disengaging of the one-pedal drive mode at the same time, which can cause the vehicle to not slow down when the foot is lifted off the accelerator. If the driver is unaware that 1PD has become disengaged unintentionally (which cannot be re-engaged without power-cycling the vehicle), it could lead to a crash as the driver is not expecting to use the brake pedal. In a moment's notice situation, it could be deadly. The vehicle has not been inspected, however, this problem has been reported by many other Mustang Mach-E owners. I will link my forum post at the end of this report which has other claims of this fault. The vehicle is available for inspection upon request. It cannot be easily reproduced as it is entirely random. Yesterday (11/8/2023 @ 1:40 EST), I was pulling into a parking spot with concrete posts around it. This time, it happened as I was turning into the spot. I was in Whisper mode this time. I noticed the car SPED UP a bit as I was letting my foot off the accelerator, and I had to slam on the brakes. Sure enough, "Drive Mode Not Available" was up on the screen. I was about 1 inch away from this concrete post. If my reaction time was just a bit slower in hitting the brakes, the vehicle would have crashed itself, relatively outside of my control. https://www.macheforum.com/site/threads/huge-safety-issue-1pd-drive-mode-not-available.31712/

Filed Sep 18, 2023 · Acceleration · 14,750 miles · FL · crash · 1 injury

The contact owns a 2021 Ford Mustang Mach E. The contact stated that while driving slowly in reverse and reversing of a parking space, the vehicle suddenly experienced unintended acceleration and erroneously drove across the street before crashing into an apartment building wall. During the crash, the driver sustained a lower back injury and left arm laceration which required medical treatment. The vehicle was towed to a local body shop. No police report was taken. The cause of the failure was not determined. The manufacturer was notified of the failure. The local dealer was not contacted. The failure mileage was 14,750.

Filed Jun 12, 2023 · Driver assistance · 30,000 miles · CT · crash · 3 injuries

The contact owns a 2021 Ford Mustang Mach E. The contact stated that while the wife was driving the vehicle and approaching oncoming traffic the vehicle was stopped. Immediately after stopping the pre-collision warning activated and the vehicle suddenly experienced unintended acceleration crashing into the rear of a second vehicle and pushing the vehicle nearly 50 feet into and across the street intersection. During the incident the driver sustained an injured neck, the front passenger sustained an injured neck and fractured left wrist. Both occupants required medical treatment. Also, the second vehicle's occupant sustained an unknown injury. No further information was available. A police report was taken at the scene and both vehicles were towed to an undisclosed location. The cause of the failure was not determined. The contact indicated that the vehicle's pre-collision warning system had been serviced prior to the incident. The local dealer was notified of the failure. The manufacturer was not yet contacted. The failure mileage was 30,000.

Filed Mar 11, 2023 · Electrical, Transmission · OH

I went to start the vehicle and it gave me a red warning "stop safely now". It was already stopped and would not start at all. It had plenty of charge on the battery pack. It's been at the dealer for nearly two weeks and they have had to order the HVJBC, I believe. I am fortunate that it didn't fail while driving or parked in a place which was inaccessible to a tow truck. The forum I read recommended making a report. This seems to be an all to common problem with this car and can lead to sudden acceleration or deceleration while in motion. Had had received an earlier yellow warning for "service vehicle soon" and took it to the dealership and they assured me they had updated all the software (in the hopes of preventing the "stop safely now" problem). Obviously, that didn't work.

Filed Mar 10, 2023 · Acceleration, Electrical · WI

Unintended acceleration from a stop when pushing accelerator. Has happened 2 times in the last 2 days. I touched the throttle from a stop 2 time and it took off like I put the accelerator to full throttle (which I didn’t). Very dangerous situation in parking lots or around pedestrians. I have scheduled an apt with my local dealer.

Filed Nov 15, 2022 · Brakes, Transmission · 21,000 miles · MI

The contact owns a 2021 Ford Mustang Mach-E. The contact stated while in reverse(R) and driving approximately 3 MPH, the vehicle would independently brake suddenly. The contact stated that the parking brake light was illuminated. The contact stated that the brake failure was intermittent and occurred without warning. Additionally, the contact stated that the vehicle would lunge forward while stopped at a traffic signal without depressing the accelerator. The vehicle was not taken to the local dealer; however, the local dealer was contacted, and the contact was asked if she had duplicated the failure. The contact stated that she could not since the failure was intermittent. The vehicle had not been repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 21,000.

Filed Oct 21, 2022 · Acceleration · 2,335 miles · FL · crash

The contact owns a 2021 Ford Mustang Mach-E. The contact stated that while her husband was driving slowly into the garage and the vehicle suddenly experienced unintended acceleration and crashed into the home and went through to the bedroom, causing damages to the vehicle and the home. No warning lights were illuminated. The vehicle was taken to a local dealer for an unrelated recall repair and the contact made the mechanic aware of the failure. The mechanic confirmed that there was no related recall on the VIN. The vehicle was not diagnosed. The contact was concerned about the safety of driving the vehicle and was referred to the manufacturer for guidance. The contact filed a claim with the insurance provider and the vehicle, and the home was repaired. The manufacturer was made aware of the failure and a case number was provided. The approximate failure mileage was 2,335.

Filed Oct 19, 2022 · Acceleration, Electrical · FL · crash · 1 injury

The contact owns a 2021 Ford Mustang Mach-E. The contact stated that while her mom was driving, the vehicle accelerated without warning. The electrical system was inoperable. While the contact was driving at low speed in a parking lot approaching a stop sign, the vehicle accelerated. The brake pedal was applied but the vehicle continued to drive and crashed into a Toyota 4 Runner. The air bag deployed and impacted the driver in the face and she sustained knee injuries and cuts on her stomach and blood in her stool. A police report was filed. There were no reported fires. The vehicle was towed to an independent collision center. The vehicle was taken previously to the local dealer where the hardware was updated and a reboot was completed. The vehicle was repaired but the failure persisted. The manufacturer was not contacted. The failure mileage was unknown. The VIN was not available.