BMS family
BMS_a020_SW_Brick_Instability
Shutdown - Pull over and exit vehicle safely
What does the BMS_a020_SW_Brick_Instability alert mean?
The battery management system (BMS) has detected that a brick has shown second order instability noise.
What you'll see in your Tesla
- Shutdown - Pull over and exit vehicle safely
- Immediate service is required
What triggers it
The BMS detects that brickV[n], when compared with avgModulebrickV, shows large differentials and noise.
When it clears
The BMS detects that the condition clears.
Potential impact
This alert is primarily informational.
Affected models
Model S 2021+
Model X 2021+
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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.