Audi A4 1997–1999 — technical service bulletin
Bulletin 0521 · NHTSA communication 10016506 · issued Oct 13, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
1997–1999
model years
3
vehicle entries
Official summary
The warranty is extended for subject vehicles to 168,000 km (105,000 miles), regardless of time in service, for engine damage resulting from a broken timing belt. *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.