Toyota Supra 2021 — technical service bulletin
Bulletin 21TC02_Technical · NHTSA communication 10203544 · issued Oct 7, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
1
vehicle entries
Official summary
Ti: technical instructions 21tc02 improper programing in a 12v battery management system certain 2021 model year supra vehicles
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.