Audi A6 2004–2006 — technical service bulletin
Bulletin 20142931 · NHTSA communication 10021416 · issued Mar 5, 2007
Technical service bulletin
communication type
Fuel System, Gasoline
component
2004–2006
model years
5
vehicle entries
Official summary
Thumping, knocking or popping noise in fuel tank area. *kb
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.