Service bulletins for the 2004 Audi S4
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
121 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Engine are shown. Show all
| 0502 | 2005-05-19. Service bulletin. ENGINE AND ENGINE COOLING. FUEL INJECTORS UNNECESSARY REPLACEMENT. *EH |
|---|---|
| 0501 | 2005-05-19. Service bulletin. ENGINE AND ENGINE COOLING. SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101- IS NOISY. *TT |
| 0501 | 2005-05-19. Service bulletin. ENGINE AND ENGINE COOLING. FUEL INJECTORS UNNECESSARY REPLACEMENT. *EH |
| 0502 | 2005-05-19. Service bulletin. ENGINE AND ENGINE COOLING. COOLING SYSTEM PERFORMANCE LOW HEATER OUTPUT. *EH |
| 190501 | 2005-03-15. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. AFTER-RUN COOLANT PUMP, ACTIVATING (IB). TO INCLUDE 2005 S4 SEDAN, AVANT. *TT |
| 0402 | 2004-11-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VALVE COVER, DIAGNOSING OIL LEAKAGE FROM GASKETS. *TT |
| 0402 | 2004-09-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE, INTAKE MANIFOLD MOUNTING BOLT TORQUE. AUDI S4,S4 CABRIOLET, ALLROAD, A6, A8L MODEL YEAR 2004. *MJ UPDATE. *TT |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.