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Service bulletins for the 2005 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.

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

By type

By component

By trouble code

Bulletins, newest first
05052005-11-30. Service bulletin. ENGINE AND ENGINE COOLING. COOLANT LEAKAGE AROUND AUXILIARY COOLANT PUMP. COOLANT LIGHT MAY BE ILLUMINATED. *TT
5705022005-07-29. Service bulletin. EQUIPMENT:ELECTRICAL. REMOTE TRANSMITTER KEY INOPERABLE. AUDI 2005 A4, S4 SEDAN AND AVANT. *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
05022005-05-19. Service bulletin. ENGINE AND ENGINE COOLING. COOLING SYSTEM PERFORMANCE LOW HEATER OUTPUT. *EH
05022005-03-31. Service bulletin. ELECTRICAL SYSTEM. VARIOUS CONTROL MODULES WITH SPORADIC DIAGNOSTIC TROUBLE CODES STORED IN DTC MEMORY. *EH
05012005-03-31. Service bulletin. ELECTRICAL SYSTEM. TRANSPORT MODE DEACTIVATING WHEN VEHICLE ARRIVES AT THE DEALERSHIP. *EH
9105012005-03-15. Service bulletin. EQUIPMENT:ELECTRICAL. SATELLITE RADIO -R146-, INTERFERENCE WITH TIRE PRESSURE MONITORING SYSTEM OR AUDI NAVIGATION PLUS. *TT
4805012005-03-15. Service bulletin. STEERING:HYDRAULIC POWER ASSIST SYSTEM. POWER STEERING, NOISY. TO INCLUDE 2006 MODELS. *TT
2405012005-03-15. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. FUEL INJECTORS, UNNECESSARY REPLACEMENT. *TT
04022004-09-01. 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.