Acura TLX 2021–2023 — technical service bulletin
Bulletin B21674 · NHTSA communication 11033179 · issued May 18, 2026
Technical service bulletin
communication type
Electrical System
component
2021–2023
model years
3
vehicle entries
Official summary
Over The Air Update - Vehicles equipped with the System Updates application are capable of downloading and installing Over the Air System Updates. System Updates contain upgrades that fix a variety of operational errors and/or enhancements that add new functionality. Information for the various software releases can be found in this document. Software version: D.1.6.4
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.