TESLA Warning

BMS-W103

BMS_w103_HW_BMB_Memory_Parity

Also written as BMS_W103 / BMS W103 / BMS_w103_HW_BMB_Memory_Parity / bms_w103_hw_bmb_memory_parity

System
BMS
Battery Management System
Type
Warning
Category
Battery
Severity
Warning

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-W103 mean?

Tesla warning code in the Battery Management System (BMS) module. There is a problem with the programming.

Original Description

There is a problem with the programming.

Affected Tesla Models

Model SModel XModel 3Model YCybertruck

What You May Notice

  • Battery management warning: There is a problem with the programming.
  • Charging speed may be limited or sessions interrupted early
  • Reduced estimated range may appear on the touchscreen

How to Diagnose and Resolve

  1. 1 Perform a soft reboot: hold both scroll wheels until the screen restarts
  2. 2 Try a full charge cycle to recalibrate the BMS
  3. 3 If "There is a problem with the programming." persists after reboot, schedule a Tesla Service appointment
  4. 4 Avoid DC fast charging until the issue is resolved

Severity Notes

BMS-W103 is a Warning in the Battery Management System system. Schedule service soon. Monitor your vehicle for additional warnings.

Other BMS Codes

BMS_a001 BMS_a002 Tesla alert code in the Battery Management System (BMS) modu... BMS_a003 Tesla alert code in the Battery Management System (BMS) modu... BMS_a004 Tesla alert code in the Battery Management System (BMS) modu... BMS_a007 Tesla alert code in the Battery Management System (BMS) modu... BMS_a016 Tesla alert code in the Battery Management System (BMS) modu... BMS_a017 BMS_a018
View all BMS codes →