Audi A6 2000–2005 — technical service bulletin
Bulletin 0501 · NHTSA communication 10015101 · issued Apr 19, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2000–2005
model years
17
vehicle entries
Official summary
Secondary air injection (air) pump motor -v101- is noisy. *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.