Audi A4 2003–2004 — technical service bulletin
Bulletin 97 · NHTSA communication 10011889 · issued Oct 8, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003–2004
model years
3
vehicle entries
Official summary
Front oxygen sensor bank1 and engine wiring engine. Also includes audi cabriolet 2004. *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.