BMS family
BMS_a003_SW_Pack_Birth_Date_Missing
Not Available
What does the BMS_a003_SW_Pack_Birth_Date_Missing alert mean?
The Battery Management System (BMS) is unable to read a pack birth date.
What you'll see in your Tesla
- Not Available
What triggers it
The BMS is unable to read a pack birth date from the calibration block or derive one from the pack serial number on boot.
When it clears
The BMS reads a pack birth date. This likely requires a reboot.
Potential impact
If there is no histogram start time saved, histograms will not accumulate or save data without a valid pack birth date available.
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.