Subaru Ascent 2019–2023 — technical service bulletin
Bulletin 16-141-23 · NHTSA communication 10237278 · issued May 16, 2023
Technical service bulletin
communication type
Power Train
component
2019–2023
model years
5
vehicle entries
Official summary
This bulletin announces availability of reprogramming files to optimize the Transmission Control Module (TCM).
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.