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Service bulletins for the 2005 Audi A4

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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
A171557 2010043-2017-10-21. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 17 number 13-35 dated January 9, 2013. This bulletin lists engine oils that meet Audi oil quality standards (VW 501 01, 502 00, 505 00, 505 01, and 504 00/507 00).
A101511 2018288-2017-10-21. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 10 number 13-10 dated September 5, 2013. Prior to engine replacement, any debris lodged in transferred assemblies must be removed. If the engine experienced a serious mechanical problem, it is possible that small pieces of metal debris resulting from the mechanical problem may have become deposited in the intake manifold, air intake hoses, exhaust manifolds, exhaust down-pipes, turbocharger, supercharger, and/or intercooler. If these metal debris pieces are not removed prior to the installation and operation of the replacement engine, they could be drawn into the combustion chamber, which can cause a knocking noise and subsequent serious engine damage.
A011516 2013060-2017-10-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 01 number 08-05 dated December 22, 2008. The MIL is on. DTC P0299 (Turbo/Super Charger Underboost) is stored in the engine control module (ECM). The condition may be the result of an abnormal turbocharger recirculation valve.
SB-01-12-572016-04-26. Service bulletin. ENGINE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-01-15-292015-10-15. Service bulletin. ENGINE. AUDI: ENGINE, ON SOME VEHICLES, WOULD RUN IRREGULARLY OR HAVE MALFUNCTION INDICATOR LAMP (MIL) ON OR POSSIBLE FILTER ELEMENT FOR CAMSHAFT ADJUSTMENT VALVE CAN LOOSEN AND IN OIL CIRCUIT, THERE IS NO DAMAGE FROM LOOSENED PARTICLES. MODEL ALL. ALL YEARS. *PE
TSB-01-13-702013-04-11. Service bulletin. ENGINE. AUDI: 01 MIL ON P1545, P0121, P0123, P0221, OR P0222 STORED IN ECM. A NUMBER OF INCIDENT MEMORY ENTRIES WITH REGARD TO THROTTLE VALVE ARE STORED IN THE ECM. IN MOST CASES, THE ENTRIES ARE SPORADIC. *JS UPDATED 04/15/2013 *JS
2015505-102012-05-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: 01 MIL ON (P1297, P2187, P2279), OIL LEAKS, PRESSURE LOSS, SYSTEM TOO LEAN AT IDLE SPEED, AND INTAKE AIR SYSTEM LEAK. THERE MAY BE WHISTLE NOISE/AIR RUSHING NOISE FROM THE ENGINE. ALSO INCLUDED MODEL AUDI TTS MODEL YEARS 2010-2011. *JS
TSB-01-12-392012-04-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM. AUDI: ENGINE HAS REDUCED ENGINE PERFORMANCE WITHOUT LOSS OF POWER OR STALLING; CIRCUIT GROUNDS; FUEL QUALITY POOR; MIL IS CONSTANTLY ILLUMINATED OR FLASHING; ROUGH IDLE; IGNITION COILS INCORRECTLY INSTALLED; ELECTRICAL CONNECTIONS LOOSE OR DAMAGED. *PE
TSB-01-11-352012-02-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: SOME VEHICLES MAY EXPERIENCE SEVERAL MALFUNCTIONS REGARDING THE INTAKE FLAP MOTOR OR INTAKE MANIFOLD RUNNER POSITION SENSOR THAT MAY BE INOPERATIVE. *PE
TSB-24-11-652011-06-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: THE MALFUNCTION LIGHT IS ON WITH STORED TROUBLE CODES. THERE IS A SOFTWARE UPDATE. *RM
TSB-15-11-182011-06-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: THERE IS A TICKING NOISE FROM THE ENGINE AREA WHICH MAY BE CAUSED BY WEAR IN THE CAMSHAFT. *RM
SAC-28F2-REV2011-03-23. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. AUDI: GASOLINE ENGINE VEHICLES; INSPECT, AND IF NECESSARY, REPLACE IGNITION COILS. VEHICLES AFFECTED BY THIS ACTION MAY HAVE IGNITION COILS THAT COULD MALFUNCTION UNDER CERTAIN CONDITIONS. ADDED FINAL MAILING PHASE-8/10 VIN INFORMATION. MODELS A4/CABRIOLET; TT; A3; A8; A6; S4; ALLROAD; RS4; Q7; S6; S8. *PE
TSB-20-10-102011-03-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: ONE OR MORE OF THE FOLLOWING DTCS ARE STORED WITHIN FIRST 60 SECONDS, WHEN COOLANT TEMPERATURE IS BETWEEN 10-39%C ACCORDING TO FREEZE FRAME DATA: DTC P0300 (RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED); DTC P0301-P0306 (CYL. 1 MISFIRE DETECTED-CYL. 6 MISFIRE DETECTED). *PE
TSB-28F22011-01-20. Service bulletin. ELECTRICAL SYSTEM:IGNITION; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. AUDI: EMISSIONS SERVICE ACTION CIRCULAR. GASOLINE ENGINE VEHICLES INSPECT, AND IF NECESSARY, REPLACE IGNITION COILS. VEHICLES AFFECTED BY THIS ACTION MAY HAVE IGNITION COILS THAT COULD MALFUNCTION UNDER CERTAIN CONDITIONS. THE MALFUNCTION INDICATOR LAMP (MIL) WILL ILLUMINATE TO LET YOU KNOW THAT THE VEHICLE MAY EXPERIENCE SOME DETERIORATION IN PERFORMANCE. *PE
TSB-24-10-022010-11-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; FUEL SYSTEM, OTHER. AUDI: MIL ON AND ONE OR MORE OF THE FOLLOWING DTCS ARE STORED IN THE ECM DATA MEMORY-P310B (LOW PRESSURE FUEL SYSTEM REGULATION, FUEL PRESSURE OUTSIDE TOLERANCE); P129F OR P008B (LOW PRESSURE FUEL SYSTEM, PRESSURE TOO HIGH); P129E OR P008A (LOW PRESSURE SYSTEM, PRESSURE TOO LOW); P2540 (LOW PRESSURE FUEL SYSTEM, PRESSURE OUT OF RANGE); P0087 (RAIL FUEL PRESSURE SYSTEM, PRESSURE TOO LOW). MODELS A3,4,6,8, S6,8, RS4, Q7, AND TT (2005-2008). *PE
SA-28F2 J12010-07-26. Service bulletin. ELECTRICAL SYSTEM:IGNITION; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. AUDI: (REVISED) VEHICLES AFFECTED BY THIS ACTION MAY HAVE IGNITION COILS THAT COULD MALFUNCTION UNDER CERTAIN CONDITIONS. IF THIS HAPPENS, THE MALFUNCTION INDICATOR LAMP (MIL) WILL ILLUMINATE TO LET YOU KNOW THAT THE VEHICLE MAY EXPERIENCE SOME DETERIORATION IN PERFORMANCE. IN SOME CASES, A MALFUNCTIONING IGNITION COIL MAY CAUSE A VEHICLE TO EXCEED FEDERAL AND/OR CALIFORNIA EMISSIONS STANDARDS. *PE UPDATED 8/9/10. *PE UPDATED 8/11/10. *PE UPDATED 11/8/10. *PE UPDATED 11/10/10. *PE UPDATED 1/10/11. *PE
TSB-24-07-202010-05-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: COLD ENGINE RUNS ROUGH OR STUMBLES; WARM ENGINE MAY STALL WHEN ENGAGING GEAR AND VEHICLE IS STATIONARY. ENGINE MAY IDLE ROUGH AFTER A COLD START; ENGINE MAY STUMBLE OR HESITATE AT SLOW INITIAL ACCELERATION AFTER A COLD START AND UNDER CERTAIN WEATHER CONDITIONS. ENGINE MAY ATTEMPT TO STALL AT IDLE WHEN TRANSMISSION IS SHIFTED FROM NEUTRAL OR PARK TO DRIVE OR REVERSE WHEN COOLANT TEMPERATURE IS ABOVE 176% (80%) AND THE VEHICLE IS STATIONARY. NO DIAGNOSTIC TROUBLE CODES (DTC) ARE ASSOCIATED WITH THIS CONDITION. *PE
TSB-17-07-132010-02-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). AUDI: OIL LEAKS. ONE OR MORE OF THE FOLLOWING CONDITIONS MAY BE PRESENT-MIL ON, AND ONE OR MORE OF FOLLOWING DTCS ARE STORED IN ECM DATA MEMORY-P1297 (CONNECTION CHARGER THROTTLE VALVE, PRESSURE LOSS), P2187 (FUEL TRIM BANK 1, SYSTEM TOO LEAN AT IDLE SPEED), P2279 (INTAKE AIR SYSTEM LEAK), WHISTLE NOISE, AIR RUSHING NOISE FROM ENGINE, OIL LEAKS FROM OIL FILTER CAP. *PE
TSB-28-09-052009-10-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: MIL ON, ENGINE SPEED SENSOR SPACER NOT REQUIRED (DTC P0300, P0335, P0336, P0321, P0322). MULTIPLE MISFIRES DETECTED ON ONE OR MORE CYLINDERS; MALFUNCTION INDICATOR LIGHT (MIL) MAY BE ON OR FLASHING. *PE
TSB-24-08-762009-06-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. AUDI: MIL ON. MAY BE SLIGHT POWER REDUCTION AT HIGH RPMS. THIS CONDITION DOES NOT CAUSE STALLING. VACUUM LINE CRACKS. *PE
24-08-132008-09-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:ENGINE. AUDI: RVU-ENGINE CONTROL MODULE UPDATE. *PE
2408122008-07-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MIL ON (DTC P310B AND/OR P129F) AND ONE OR MORE OF THE FOLLOWING DTCS ARE STORED IN THE ECM DATA MEMORY. *PE
28 08 042008-05-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MIL ON, ENGINE SPEED SENSOR SPACER NOT REQUIRED (DTC P0300, P0335, P0336, P0321, P0322). *NJ
07172008-02-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. COLD ENGINE RUNS ROUGH OR STUMBLES; WARM ENGINE MAY STALL WHEN ENGAGING GEAR AND VEHICLE IS STATIONARY. *NJ UPDATED 4/15/07. *NJ
200365822007-07-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. LOSES POWER OR WILL NOT MOVE AFTER STOP. *KB

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