Subaru Forester 2019–2021 — technical service bulletin
Bulletin 16-147-24 · NHTSA communication 10251098 · issued Feb 6, 2024
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
3
vehicle entries
Official summary
This bulletin addresses limited cases of engine speed drop when the engine is restarted with the auto start/stop function. Updated software available for the Transmission Control Module (TCM), will optimize the engine cranking speed monitoring program of the 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.