Audi A4 2004–2008 — technical service bulletin
Bulletin TSB-28-09-05 · NHTSA communication 10030629 · issued May 12, 2009
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004–2008
model years
9
vehicle entries
Official summary
Audi: mil on, engine speed sensor spacer not required (dtc p0300, p0335, p0336, p0321, p0322). Multiple misfires detected on one or more cylinders; malfunction indicator light (mil) may be on or flashing. *pe
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.