Audi A4 1996–1998 — technical service bulletin
Bulletin 9804 · NHTSA communication 604438 · issued Dec 18, 1998
Technical service bulletin
communication type
Engine and Engine Cooling
component
1996–1998
model years
3
vehicle entries
Official summary
Vehicle exhibiting a whining / whirring type noise at certain mph ranges. *tt
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.