Toyota BZ4X 2021–2023 — technical service bulletin
Bulletin T-SB-0120-20 Rev · NHTSA communication 10234325 · issued Mar 15, 2023
Technical service bulletin
communication type
Steering
component
2021–2023
model years
10
vehicle entries
Official summary
TSB: Some 2021 ? 2023 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software when the Electronic Control Unit (ECU) is replaced. Techstream software has been modified to indicate when configuration software is required. A new Configure column has been added to the Techstream Health Check Results screen to show when configuration software is available for a specific ECU. Follow the Operation Procedure in this bulletin to complete the ECU Software Configure Process.
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.