High-voltage battery charging failure
FUEL/PROPULSION SYSTEM
8 NHTSA complaints · 2025-04 → 2026-05 (sample of 200 most-recent of 640 total)
“BMS_a079 error. Battery is no longer able to charge. High voltage battery will need to be replaced. Basically rendering the vehicle useless unless the battery is replaced.”
“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…”
“my 21 M3P 27K miles threw BMS_a079 I've never used a supercharger and rarely charge over 80% mostly charging at work on lvl 2 & occasionally at home on lvl 1 vehicle will no longer charge I've tried 2 Button reset and HV disconnect no help. 27k miles seems unreasonable for a…”
“I have been very cautious on charging my Tesla Model 3 and have followed all of the manufacturer's recommendations. The HV battery recently failed at 105,050 miles. South Korea has noted a battery reliability issue for this year car and model, so I am reporting this to you so…”

