Subaru Impreza 2002 — technical service bulletin
Bulletin 010901 · NHTSA communication 627853 · issued Sep 1, 2001
Technical service bulletin
communication type
Engine and Engine Cooling
component
2002
model years
1
vehicle entries
Official summary
Subject regarding knock sensor circuit low input. *yd
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.