Subaru Ascent 2019–2026 — technical service bulletin
Bulletin 09-141-26 · NHTSA communication 11037946 · issued Sep 29, 2026
Technical service bulletin
communication type
Engine
component
2019–2026
model years
8
vehicle entries
Official summary
This Bulletin provides a diagnostic procedure for customer concerns about hesitation, reduced acceleration, or lack of power when driving uphill or under heavy engine load.
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.