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Service bulletins for the 2004 Audi A6

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.

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

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By component

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Bulletins, newest first
AWA-08-042008-07-09. Service bulletin. ENGINE AND ENGINE COOLING. ENGINE COOLANT TEMPERATURE SENSOR WARRANTY EXTENSION FOR CERTAIN 2001-2004 MODEL YEAR AUDI VEHICLES. *PE
07152008-02-21. Service bulletin. EXTERIOR LIGHTING. EXTERIOR LIGHTS, MOISTURE ACCUMULATION. *NJ
9407112007-08-15. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. HEADLIGHT RANGE CONTROL WARNING LIGHT ON. HEADLIGHTS ARE FUNCTIONING PROPERLY. *KB
3707102007-08-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. MIL ON, AND/OR MULTITRONIC TRANSMISSION IN EMERGENCY RUNNING MODE (DTC P0706 OR P1793 IN TCM). *KB
200365822007-07-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. LOSES POWER OR WILL NOT MOVE AFTER STOP. *KB
200562432007-07-06. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. HEADLIGHT AIMING, USING HELLA UNIVERSAL BEAMSETTER. *KB
3807042007-06-27. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. VEHICLE WILL NOT MOVE IN ANY GEAR. *KB
3807022007-04-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SHUDDERS WHEN ACCELERATING AT 10 TO 50% THROTTLE FROM A STATIONARY POSITION, SOMETIMES WITH FLUCUATING ENGINE SPEED. *KB
06012006-03-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CONTROL HOUSING FOR CAMSHAFT ADJUSTER, ENSURING SHIM WASHER INSTALLATION WHEN REPAIRING. *TT
06012006-02-13. Service bulletin. POWER TRAIN. VEHICLE SHUDDERS WHEN ACCELERATING AT 10 TO 50% THROTTLE FROM A STATIONARY POSITION, SOMETIMES WITH FLUCTUATING ENGINE SPEED. *TT
05262005-12-19. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. AUTHORIZATION REQUIREMENTS FOR AUTOMATIC TRANSMISSIONS. *TT
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
3205012005-11-15. Service bulletin. POWER TRAIN. MIL ILLUMINATED, DTC 17125 STORED IN TRANSMISSION FAULT MEMORY-NO DRIVEABILITY CONCERN. TORQUE CONVERTER CLUTCH CIRCUIT PERFORMANCE OR STUCK OFF STORED IN TRANSMISSION FAULT MEMORY. *SC
1905042005-07-29. Service bulletin. ENGINE AND ENGINE COOLING. THE COOLANT RESERVOIR IS DIAGNOSED TO BE LEAKING AND INTENDED TO BE REPLACED. *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. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. FUEL INJECTORS, UNNECESSARY REPLACEMENT. UPDATE. *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
04062005-02-03. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. COOLANT LEAK AT OIL COOLER HOSES. *TT
3704022005-01-27. Service bulletin. POWER TRAIN. TRANSMISSION SHUDDERS PRIOR TO COMING TO A STOP. *TC
04022004-11-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VALVE COVER, DIAGNOSING OIL LEAKAGE FROM GASKETS. *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
04052004-08-31. Service bulletin. ELECTRICAL SYSTEM. UPDATE PROGRAMMING (FLASHING) TRANSMISSION CONTROL MODULE (TCM). *MJ

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