2021 Ford Mustang Mach E transmission problems

Filed Oct 11, 2026 · Electrical, Transmission · CA

2021 model mustang Mache got a new High Voltage Battery Warning on the dashboard and asked to stop the vehicle. My car is Premium trim standard range, but other trims and extended range battery models were recalled for this exact issue earlier, but the premium trim standard range car was not included in recalls. I have read online forums that many people who own standard range cars are seeing this warning suddenly now. Please work with Ford to include standard range cars from 2021 mustang Mache EV to recall for this repair, i think it is also called HVBJB error. I don't have the exact recall number issued for extended range cars earlier for this same error.

Filed Sep 28, 2026 · Electrical, Transmission · TX

I own a 2021 Ford Mustang Mach-E Standard Range RWD. My vehicle has experienced a high-voltage powertrain malfunction involving the high-voltage battery system/HV Battery Junction Box (HVBJB). The vehicle is currently at a Ford dealership for diagnosis and repair. What concerns me is that the same high-voltage/powertrain warning appeared on my vehicle previously, before the vehicle reached 100,000 miles. The warning appeared in my FordPass history, then went away. The vehicle later developed the same type of warning again, and the problem has now resulted in a current high-voltage powertrain malfunction. My vehicle is not included in the existing HVBJB recall (23S56) based on its VIN/build configuration. I believe this may indicate that vehicles outside the current recall population can experience the same HVBJB/high-voltage failure. I contacted Ford about the issue and requested Goodwill Assistance. Ford denied the request. I am asking the federal safety agency to review whether the existing recall population adequately covers 2021 Mustang Mach-E vehicles experiencing this failure and whether vehicles outside the current recall population may have the same safety defect. The fact that the warning appeared before 100,000 miles is particularly important because it suggests the current failure may have been preceded by an earlier warning while the vehicle was still below the mileage associated with the battery warranty. I have FordPass history documenting the earlier warning and can provide additional documentation, including dealership diagnostic information, repair records, and photographs/screenshots if requested. I am concerned about the safety implications of a high-voltage battery/powertrain failure because loss of propulsion can occur while driving and may create a hazardous situation, particularly in traffic or at highway speeds.

Filed Sep 28, 2026 · Electrical, Fuel system · TX

While accelerating on a highway on-ramp, the vehicle displayed Powertrain Malfunction/Reduced Power, a High-Voltage Battery Warning. Power was reduced while merging into traffic. The same warnings appeared at about 90,000 miles and cleared on their own. This is a Standard Range RWD Mach-E, which was excluded from the high-voltage battery junction box recall. The vehicle was towed to AutoNation Ford Katy and diagnosed with HVBJB failure. Loss of propulsion at highway speeds is a safety hazard. I am requesting that the federal safety agency investigate whether Standard Range vehicles should be included in the recall.

Filed Aug 18, 2026 · Transmission · TX

My 2021 Ford Mustang Mach-E suffered a total loss of motive power on the road, throwing code P0D10:00:AF for a stuck-open high-voltage contactor. This is the exact failure mode of Safety Recall 23S56. Ford is refusing to cover the repair because my VIN was omitted from the database and the vehicle is at 108,017 miles, treating a hazardous powertrain defect as an out-of-warranty consumer expense. I have an active case number with Ford.

Filed Jul 17, 2026 · Engine, Transmission · OH

While driving my 2021 Ford Mustang Mach-E, the front electric drive unit failed suddenly with no warning signs, warning lights, unusual noises, or any prior indication of a problem. During the failure, multiple fault messages appeared on the instrument cluster, including warnings that disabled adaptive cruise control and indicated the all-wheel-drive system was no longer functioning. The vehicle began to vibrate severely, feeling as though it was driving over rumble strips. As I slowed down, the front of the vehicle became extremely clunky and exhibited abnormal drivetrain behavior. Shortly afterward, the vehicle became undrivable and could no longer be operated under its own power. It had to be towed to a Ford dealership, where I was informed that the front electric drive assembly had failed and required replacement. This is the second time this exact component has failed on the same vehicle. The first front electric drive assembly failed at approximately 33,000 miles and was replaced under warranty. The second failure occurred at approximately 102,000 miles with no warning. I believe this repeated and sudden failure of a critical drivetrain component presents a significant safety concern because it can leave drivers stranded without warning and results in an unexpected loss of propulsion while operating the vehicle in traffic.

Filed Jul 17, 2026 · Engine, Transmission · OH

While driving my 2021 Ford Mustang Mach-E, the front electric drive unit failed suddenly with no warning signs, warning lights, unusual noises, or any prior indication of a problem. During the failure, multiple fault messages appeared on the instrument cluster, including warnings that disabled adaptive cruise control and indicated the all-wheel-drive system was no longer functioning. The vehicle began to vibrate severely, feeling as though it was driving over rumble strips. As I slowed down, the front of the vehicle became extremely clunky and exhibited abnormal drivetrain behavior. Shortly afterward, the vehicle became undrivable and could no longer be operated under its own power. It had to be towed to a Ford dealership, where I was informed that the front electric drive assembly had failed and required replacement. This is the second time this exact component has failed on the same vehicle. The first front electric drive assembly failed at approximately 33,000 miles and was replaced under warranty. The second failure occurred at approximately 102,000 miles with no warning. I believe this repeated and sudden failure of a critical drivetrain component presents a significant safety concern because it can leave drivers stranded without warning and results in an unexpected loss of propulsion while operating the vehicle in traffic.

Filed Feb 19, 2026 · Electrical, Transmission · IL

Vehicle experienced immediate loss of motive power while in motion at 45 mph after "Stop Safely Now" alert. This is a repeat power failure. The vehicle was in service for 75+ days (Dec-Feb) for this exact defect. The Ford service center said they replaced the “battery controller” yet the issue recurred. The car previously flagged this alert while in motion 2 times prior (one on the highway going ~65mph and on another major street going roughly ~45 mph). As a Ford Reacquired Vehicle (Buyback), the failure to resolve this catastrophic electrical fault creates an extreme risk of crash and entrapment in traffic, putting myself, my family and the drivers in vicinity at significant safety risk. The car is currently at a different Ford Service Center. They have been able to reproduce the issue and are currently running diagnostics to identify a resolution.

Filed Feb 4, 2026 · Transmission · OH

On Saturday, [XXX], while driving under normal conditions, the vehicle experienced a sudden and complete loss of propulsion without warning. There was no reduced-power mode, no dashboard alert, and no mobile app notification prior to shutdown. The vehicle was subsequently inspected by a Ford dealership. The technician identified an intermittent software-related condition consistent with Ford TSB 26-2005, which documents a fault capable of draining the 12-volt electrical system during vehicle operation. The technician stated the 12-volt battery is not believed to be the root cause. The loss of propulsion occurred while the vehicle was in motion and resulted in a full shutdown. The condition was not preceded by any driver warning or controlled degradation. No driver warning was received after shutdown. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 22, 2026 · Electrical, Transmission · FL

I am requesting immediate escalation regarding my 2021 Ford Mustang Mach-E (VIN: [XXX] ), which is currently undrivable due to being stuck in “Power Accessory Active” mode. The vehicle will not enter Drive. The dealer has diagnosed DCEM / high-voltage system-related faults and stated that recall repairs cannot be completed unless I first pay approximately $3,000 to repair the “main battery.” My concern is that the symptoms and failure mode exactly match the known High-Voltage Battery Junction Box / DCEM defect described in Ford Safety Recall 23S56, including: •Vehicle unable to drive •High-voltage system refusing to close contactors •Vehicle remaining in accessory power mode •Safety-related loss of motive power While my VIN may not be currently listed as eligible for these recalls, my vehicle is exhibiting identical symptoms and failure modes associated with the following Ford safety recalls: •HV Battery Junction Box / DCEM defect (Recall 23S56) •Powertrain / Software Update (Recall 22S29) •12-Volt Battery / Door Latch Entrapment Risk (Recall 25S65) It is important to note that other Mustang Mach-E owners have reported the same recall-related failures even when their VINs were not listed for these recalls. These failures involve contactor issues, loss of motive power, and vehicles being stuck in accessory mode — identical to the symptoms my vehicle is experiencing. Given that my vehicle is experiencing a safety-related loss of motive power, Given the safety implications and known defect history, I request that this matter be reviewed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 20, 2025 · Brakes, Engine · 40,400 miles · SC

The contact owns a 2021 Ford Mustang Mach-E. The contact stated that while driving approximately 20 - 25 MPH in the rain at night, the brake pedal was bouncing up and down. The contact stated that the doors locked and failed to open. Additionally, the vehicle stalled. The contact stated that the hazard lights were inoperable. They stated that one of the passenger’s side tire warning lights was illuminated. The contact stated that the battery was at 98 percent and that several unknown warning lights were illuminated. The vehicle was taken to the local dealer to be repaired under the federal safety agency Campaign Number: 22V333000 (Vehicle Speed Control, Power Train) prior to the failure. The contact called Roadside Assistance, but Roadside Assistance was unable to assist. The contact stated that a Police Officer arrived on the scene to assist. The vehicle was towed to the local dealer after several hours. The vehicle was not diagnosed or repaired. The manufacturer was contacted but no assistance was provided. The failure mileage was approximately 40,400.