BMS family
BMS_w179_ReplaceSmartFuseLimp
Vehicle may not restart
What does the BMS_w179_ReplaceSmartFuseLimp alert mean?
The Battery Management System (BMS) has detected the High Voltage (HV) battery pyro fuse is close to expiration. The fuse must be replaced with a new self-powered hybrid pyro fuse.
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
BMS detects that the HV battery pyro fuse is 3 months past its recommended end of life.
When it clears
Pyro fuse is replaced with a self-powered hybrid pyro fuse.
Potential impact
Vehicle drive power will be reduced.
Affected models
Model S 2012-2020
Model X 2015-2020
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.