2021 Tesla Model 3 Complaint
Power Train
Filed January 19, 2026 · Incident date October 29, 2025
- Vehicle
- 2021 Tesla Model 3
- Component(s)
- Power Train
- Complaint filed
- January 19, 2026
- Date of incident
- October 29, 2025
- Reported VIN
- 5YJ3E1EB7MF
Owner's description
The high-voltage traction battery pack has failed twice on my 2021 Tesla Model 3, both times while the vehicle was under the original battery warranty. The failures occurred on: • 08/30/2022 at approximately 15,100 miles • 11/08/2025 at approximately 57,222 miles The exact error code by Tesla was bms_a079, which doesn’t let the vehicle charge at all. The vehicle was drivable before the battery depleted. The defect has been reproduced, confirmed, and repaired by the manufacturer twice, but the same critical system has failed again after replacement, raising concern of a recurring defect. The failed component is the high-voltage battery pack. The component was inspected by Tesla, and in both cases Tesla confirmed battery failure and replaced the entire HV battery pack with a remanufactured unit under warranty. The failed components were retained by Tesla and are available for inspection by the manufacturer.
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Data sourced from the NHTSA Complaints database. Complaints are submitted by vehicle owners and have not been independently verified.