Subaru Forester 2017–2018 — technical service bulletin
Bulletin 09-84-22R · NHTSA communication 11037934 · issued Sep 16, 2026
Technical service bulletin
communication type
Engine
component
2017–2018
model years
2
vehicle entries
Official summary
This bulletin announces Warranty Extension and design changes made to the front exhaust pipe and covers to address the concerns of some customers regarding an odor or a rattle-type noise/fluttering sound coming from the undercarriage, during acceleration. This is an revised version of the original bulletin.
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.