TESLA Alert
BMS-A164
BMS_a164_SW_Uncontrolled_Regen
Also written as BMS_A164 / BMS A164 / BMS_a164_SW_Uncontrolled_Regen / bms_a164_sw_uncontrolled_regen
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-A164 mean?
Tesla alert code in the Battery Management System (BMS) module. Alert that pyro is being blown for an uncontrolled regen event
Original Description
Alert that pyro is being blown for an uncontrolled regen event
Affected Tesla Models
Model SModel XModel 3Model YCybertruck
What You May Notice
- BMS-A164 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-A164 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.
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 →