BMS-A003
BMS_a003_SW_Pack_Birth_Date_Missing
Also written as BMS_A003 / BMS A003 / BMS_a003_SW_Pack_Birth_Date_Missing / bms_a003_sw_pack_birth_date_missing
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does BMS-A003 mean?
Tesla alert code in the Battery Management System (BMS) module. BMS was unable to read a pack birth date from the calibration block or derive one from the pack serial number BMS detects that both of the FC Link contactors is welded
Original Description
BMS was unable to read a pack birth date from the calibration block or derive one from the pack serial number BMS detects that both of the FC Link contactors is welded
Affected Tesla Models
What You May Notice
- BMS-A003 may appear with another Tesla alert in the Battery Management System (BMS) system.
- The vehicle may limit charging, driving, comfort, or safety features depending on the active alerts.
- The alert may clear after sleep, but recurring alerts should be treated as service-relevant.
How to Diagnose and Resolve
- 1 Reboot the vehicle (hold both scroll wheels for 10 seconds)
- 2 Check the Tesla app for any pending software updates
- 3 Monitor the alert over 1–2 charge cycles; schedule service if it recurs
Severity Notes
BMS-A003 is an Alert in the Battery Management System system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.