2021 Ford Mustang Mach E Power Train Problems
Owners have filed 53 complaints with NHTSA about power train problems on the 2021 Ford Mustang Mach E, 15% of all complaints for this model year. Half of the reports with a mileage happened before 19,500 miles. The words owners use most often: “high voltage” (32% of reports).
- 53power train complaints
- 19,500median miles at failure
- 1mention a crash
- 1mention an injury
- 2related recalls
- 43%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 17 of 53 complaints (32%)
- Stop safely: mentioned in 12 of 53 complaints (23%)
- Battery junction box: mentioned in 9 of 53 complaints (17%)
- Powertrain malfunction: mentioned in 6 of 53 complaints (11%)
At what mileage do power train problems happen?
Based on 4 complaints that reported the odometer reading.
How serious are the reports?
Of 53 complaints, 1 mention a crash, 1 an injury.
Ford Mustang Mach E power train complaints by model year
| Model year | Power Train complaints | Share of that year | Median miles |
|---|---|---|---|
| 2025 Mustang Mach E | 3 | 21% | — |
| 2024 Mustang Mach E | 9 | 19% | — |
| 2023 Mustang Mach E | 23 | 18% | 1,317 |
| 2022 Mustang Mach E | 28 | 20% | 23,750 |
| 2021 Mustang Mach E | 53 | 15% | 19,500 |
When owners reported it
Related recalls (2)
Power train:driveline:differential unit
Problem: Ford Motor Company (Ford) is recalling certain 2021-2023 Mustang Mach E vehicles. The rear differential pinion shaft may fracture.
Risk: Differential pinion shaft fracture may result in a loss of drive power, or unintended vehicle movement if the vehicle is in park without the parking brake applied, increasing the risk of a crash.
Fix: Dealers will repair or replace the rear differential assembly as necessary, free of charge. Interim letters, notifying owners of the safety risk, were mailed July 13, 2026. Additional letters will be sent once the remedy is available, anticipated in late December 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 26S50.
Power train:automatic transmission:control module:software; vehicle speed control
Problem: Ford Motor Company (Ford) is recalling certain 2021 Mustang Mach-E vehicles equipped with all-wheel drive. The powertrain control module (PCM) functional safety software may fail to detect a software error, resulting in unintended acceleration, unintended deceleration, or a loss of drive power.
Risk: Unintended acceleration, unintended deceleration, or a loss of drive power increases the risk of a crash.
Fix: The PCM software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed June 9, 2022. Owners may contact Ford customer service at 1-800-436-7332. Ford's number for this recall is 22S29.
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…
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…
Frequently asked questions
Do all 2021 Ford Mustang Mach Es have power train problems?
No. NHTSA has 53 owner complaints about power train for the 2021 Ford Mustang Mach E (15% 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 power train?
Yes: 2 safety recalls list power train. Check your VIN on NHTSA.gov to see whether the fix was done on your car.
At what mileage do power train problems start?
The median reported mileage is 19,500 miles: half of the reports with a mileage came before that.
What do owners say about power train problems on the 2021 Ford Mustang Mach E?
The most frequent phrase is “high voltage”, in 17 of 53 complaints, followed by “stop safely” (12).
Other 2021 Ford Mustang Mach E problems
See all 2021 Ford Mustang Mach E problems or power train problems across all Mustang Mach E years.