Subaru Forester 2011–2014 — technical service bulletin
Bulletin 02-157-14R · NHTSA communication 10094118 · issued Dec 2, 2014
Technical service bulletin
communication type
Engine
component
2011–2014
model years
11
vehicle entries
Official summary
Surface treatment change to oil control piston rings
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.