DI family
DI_a103_bbMIA
Not Available
What does the DI_a103_bbMIA alert mean?
One or more of the messages the Drive Inverter (DI) Electronic Control Unit (ECU) receives periodically from the Decoupled Brake Booster (BB) ECU is not received, indicating the BB ECU may be unavailable (MIA).
What you'll see in your Tesla
- Not Available
What triggers it
One or more of the expected messages from the BB ECU is not received.
When it clears
The DI ECU starts receiving the expected messages from the BB ECU during the next drive cycle.
Potential impact
Regenerative-friction brake torque blending functionality may be limited or unavailable.
Affected models
Model Y 2025+
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.