I am reporting concerns involving the high-voltage battery and battery management system (BMS) of my 2025 Tesla Model 3 Long Range AWD. The vehicle's displayed range at 100% charge has progressively declined from approximately 320 miles to 304, then 298, and most recently approximately 295 miles. A previous Tesla Battery Health Test reported approximately 89% battery health. However, the vehicle currently will not allow me to perform another Battery Health Test, leaving its present battery condition unknown. I am...
Read the full complaint
concerned that additional degradation or an underlying battery or BMS issue may be going undetected. Tesla instructed me to perform a BMS calibration by discharging the battery below 10%, allowing the vehicle to rest, charging to 100%, and allowing it to rest again. I followed these instructions, but the displayed-range concern persisted. I submitted multiple service requests, two of which Tesla closed without resolving my concerns. Tesla later performed additional remote diagnostics and stated that nothing was wrong with the vehicle. However, my concerns remain, and I have not received a documented in-person evaluation addressing the battery capacity, BMS operation, or cell/module balance. The specific cause is UNKNOWN. I cannot confirm whether the condition presents a safety risk, and I have not identified a specific safety incident, such as an unexpected loss of propulsion or battery thermal event. I have no specific warning lamps or fault messages to report. The vehicle and high-voltage battery are available for inspection. I am requesting that the reported condition be evaluated to determine whether an underlying battery or BMS defect exists and whether it could affect the vehicle's safe operation.