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RecallGazette

Vehicle problems, recalls & safety intelligence

Subaru Ascent 2015–2026technical service bulletin

Bulletin 09-74-21R · NHTSA communication 11034264 · issued Jun 26, 2026

Technical service bulletin
communication type
Fuel/propulsion System
component
2015–2026
model years
60
vehicle entries

Official summary

This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers). (This is an revised version of the original bulletin.)

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.