Subaru Ascent 2022–2023 — technical service bulletin
Bulletin 14-28-21R · NHTSA communication 10237298 · issued May 25, 2023
Technical service bulletin
communication type
Electrical System
component
2022–2023
model years
4
vehicle entries
Official summary
This Service Information Bulletin announces the new control module software reprogramming procedures for 2022MY and later BRZ models.
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.