2021 Ford Mustang Mach E Electrical System Problems
Owners have filed 155 complaints with NHTSA about electrical system problems on the 2021 Ford Mustang Mach E, 44% of all complaints for this model year. Half of the reports with a mileage happened before 30,696 miles. The words owners use most often: “high voltage” (23% of reports).
- 155electrical system complaints
- 30,696median miles at failure
- 2mention a crash
- 1mention an injury
- 4related recalls
- 47%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- High voltage: mentioned in 36 of 155 complaints (23%)
- Safely now: mentioned in 22 of 155 complaints (14%)
- Junction box: mentioned in 21 of 155 complaints (14%)
- 12V battery: mentioned in 19 of 155 complaints (12%)
At what mileage do electrical system problems happen?
Based on 17 complaints that reported the odometer reading.
How serious are the reports?
Of 155 complaints, 2 mention a crash, 1 a fire, 1 an injury.
Ford Mustang Mach E electrical system complaints by model year
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2026 Mustang Mach E | 1 | 100% | — |
| 2025 Mustang Mach E | 7 | 50% | — |
| 2024 Mustang Mach E | 31 | 66% | 9,500 |
| 2023 Mustang Mach E | 52 | 41% | 15,000 |
| 2022 Mustang Mach E | 77 | 55% | 22,498 |
| 2021 Mustang Mach E | 155 | 44% | 30,696 |
When owners reported it
Related recalls (4)
Electrical system:body control module:software; latches/locks/linkages:doors:latch
Problem: Ford Motor Company (Ford) is recalling certain 2021-2025 Mustang Mach E vehicles. In the event of a low battery charge, the electronic door latches may remain locked once the driver or front passenger exits and shuts the door, possibly trapping someone who is unable to use the inside door release handles, such as a child in the back seat.
Risk: The inability to enter or exit the vehicle in an emergency increases the risk of injury.
Fix: Dealers will update the Powertrain Control Module (PCM) and the Secondary On-Board Diagnostic Control Module C (SOBDMC) software, free of charge. Owner notification letters were mailed to 2021-2025 Mustang Mach-E owners September 12, 2025. Additionally, Owner notification letters were mailed to 2024-2025 Mustang Mach-E owners July 10, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25S65.
Electrical system:propulsion system:traction battery:management system/energy control module (bms/becm):software
Problem: Ford Motor Company (Ford) is recalling certain 2021-2022 Mustang Mach-E vehicles previously repaired incorrectly under recall number 22V-412. The high voltage battery main contactors may overheat.
Risk: An overheated high voltage battery contactor may cause the vehicle to lose drive power, increasing the risk of a crash.
Fix: Dealers will update the on-board software, free of charge. Owner notification letters were mailed April 11, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25S14.
Electrical system:propulsion system:traction battery:management system/energy control module (bms/becm)
Problem: Ford Motor Company (Ford) is recalling certain 2021-2022 Mustang Mach-E vehicles equipped with an extended range battery. The high voltage battery main contactors may overheat.
Risk: An overheated high voltage battery contactor can result in a loss of drive power, increasing the risk of a crash.
Fix: Dealers will replace the high voltage battery junction box, free of charge. Owner notification letters were mailed December 29, 2023. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 23S56. Vehicles included in this recall that were previously repaired under recall 22V-412 will need to have the new remedy completed.
Electrical system:propulsion system:traction battery:management system/energy control module (bms/becm):software
Problem: Ford Motor Company (Ford) is recalling certain 2021-2022 Mustang Mach-E vehicles. The high voltage battery main contactors may overheat.
Risk: An overheated high voltage battery contactor may cause the vehicle to lose drive power, increasing the risk of a crash.
Fix: Dealers will update the on-board software, free of charge. Owner notification letters were mailed on July 8, 2022. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 22S41.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
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…
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…
My 2021 Mustang MachE experienced a failure of the relay which connects its high-voltage battery to the rest of the car. The car is an EV, and the result of this is that the drive-motor had no power, and the car would not move. I would like to ask, please, that all model years with this known-issue…
Frequently asked questions
Do all 2021 Ford Mustang Mach Es have electrical system problems?
No. NHTSA has 155 owner complaints about electrical system for the 2021 Ford Mustang Mach E (44% of the 351 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2021 Ford Mustang Mach E electrical system?
Yes: 4 safety recalls list electrical system. Check your VIN on NHTSA.gov to see whether the fix was done on your car.
At what mileage do electrical system problems start?
The median reported mileage is 30,696 miles: half of the reports with a mileage came before that.
What do owners say about electrical system problems on the 2021 Ford Mustang Mach E?
The most frequent phrase is “high voltage”, in 36 of 155 complaints, followed by “safely now” (22).
Other 2021 Ford Mustang Mach E problems
See all 2021 Ford Mustang Mach E problems or electrical system problems across all Mustang Mach E years.