Volkswagen Passat 1998–2004 — technical service bulletin
Bulletin 0421 · NHTSA communication 10009873 · issued Aug 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
1998–2004
model years
7
vehicle entries
Official summary
Warranty extension covering certain oil sludge related repairs. *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.