BMS-F035
BMS_f035_SW_Isolation
Also written as BMS_F035 / BMS F035 / BMS_f035_SW_Isolation / bms_f035_sw_isolation
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does BMS-F035 mean?
Tesla fault code in the Battery Management System (BMS) module. There is an external or internal isolation alert while the contactors are closed. The isolation resistance exceeds the threshold when the contactors are closed.
Original Description
There is an external or internal isolation alert while the contactors are closed. The isolation resistance exceeds the threshold when the contactors are closed.
Affected Tesla Models
What You May Notice
- Battery isolation warning during or after charging
- Vehicle may not allow charging to begin
- Warning light persists even after rebooting
How to Diagnose and Resolve
- 1 Stop all charging immediately
- 2 Do not drive the vehicle — an active isolation fault means HV electricity may be leaking
- 3 Keep others away from the vehicle
- 4 Call Tesla Roadside Assistance for flatbed tow
- 5 At Service Center, the HV system will be isolated and inspected for wiring damage, coolant leaks, or compromised cells
Severity Notes
BMS-F035 is classified as a Fault, indicating a critical issue in the Battery Management System system. Do not continue driving and contact Tesla Service immediately.