Ford Crown Victoria 2003–2004 — technical service bulletin
Bulletin 0421 · NHTSA communication 10007363 · issued Feb 9, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003–2004
model years
6
vehicle entries
Official summary
Engine knock during initial cold start, the knock will cease after the engine is fully warmed up. *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.