BMS family
BMS_a098_SW_BMB_Data_Integrity_Loss
Unable to charge
What does the BMS_a098_SW_BMB_Data_Integrity_Loss alert mean?
The battery management system (BMS) has lost data integrity due to a battery monitoring board (BMB) chain double break.
What you'll see in your Tesla
- Unable to charge
- Service is required
What triggers it
The BMS detects a prolonged communication issue with the BMB daisy chain that is known to cause a loss of BMB sensor data.
When it clears
No BMB sensor data loss conditions are detected for a prolonged period of time.
Potential impact
The BMS is likely performing BMB sensor data substitution to replace data missing due to the communication issue.
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
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.