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Service bulletins for the 2002 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.

86 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
04022005-12-19. Service bulletin. ENGINE AND ENGINE COOLING. OIL LEAKS FROM UPPER ENGINE AREAS, DIAGNOSTIC GUIDELINES. *TT
05052005-11-30. Service bulletin. ENGINE AND ENGINE COOLING. COOLANT LEAKAGE AROUND AUXILIARY COOLANT PUMP. COOLANT LIGHT MAY BE ILLUMINATED. *TT
05022005-05-19. Service bulletin. ENGINE AND ENGINE COOLING. FUEL INJECTORS UNNECESSARY REPLACEMENT. *EH
05012005-05-19. Service bulletin. ENGINE AND ENGINE COOLING. SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101- IS NOISY. *TT
05012005-05-19. Service bulletin. ENGINE AND ENGINE COOLING. FUEL INJECTORS UNNECESSARY REPLACEMENT. *EH
05012005-05-19. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. FUEL INJECTORS, UNNECESSARY REPLACEMENT. UPDATE. *TT
2405012005-03-15. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. FUEL INJECTORS, UNNECESSARY REPLACEMENT. *TT
04022004-11-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VALVE COVER, DIAGNOSING OIL LEAKAGE FROM GASKETS. *TT
04062004-11-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. UDPATE PROGRAMMING (FLASHING) ENGINE CONTROL MODULE (ECM) TO CORRECT COLD START ENGINE STUMBLE. *TT
04082004-10-19. Service bulletin. FUEL SYSTEM, OTHER. LONG TERM FUEL TRIM - SYSTEM TOO RICH. DIAGNOSTIC TROUBLE CODE P1123, P1125, P1137 AND P1139. *TT
02072003-03-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. DIAGNOSIS OF DRIVEABILITY COMPLAINTS SUCH AS ROUGH IDLING, HESITATION, LACK OF POWER AND MULTIPLE MISFIRES OR DIAGNOSTIC TROUBLE CODES P0103, P1111, P1112, P1128, P1130, P1144, P1145, P1146, P1147, P1148 OR P1557 ON TURBO CHARGED ENGINES. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.