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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.

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
17123220185502024-02-20. Service bulletin. ENGINE AND ENGINE COOLING. Oil consumption measurement - Repair Authorization (CA)
Edition922023-02-06. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. Idenifying and mixing factory fill engine coolants
13352010043132022-08-01. Service bulletin. ENGINE AND ENGINE COOLING. Engine oils that meet Audi Oil Quality Standards.
1341202530332022-08-01. Service bulletin. ENGINE AND ENGINE COOLING. Discontinuation and mixing of Audi-approved engine coolants.
1335202530322022-08-01. Service bulletin. ENGINE AND ENGINE COOLING. Discontinuation and mixing of Audi-approved engine coolants.
A1915612025303-52018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 14-50 dated June 20, 2014. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service.
A171782 2010043-2018-02-05. Service bulletin. ENGINE. This informational bulletin contains all the the Audi Oil Quality Standards that should be used when doing an oil change.
A191335 2025303-2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 11-19 dated February 10, 2011. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service.
A191562 2025303-2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 15-61 dated July 7, 2015. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service.
A191341 2025303-2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 13-35 dated March 25, 2013. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service.
A171232 2018550-2017-11-08. Service bulletin. ENGINE. Supersedes Technical Service Bulletin Group 17 number 12 - 31 dated August 30, 2012. Oil consumption measurement - Repair Authorization (CA). In order to provide effective lubrication and cooling of internal engine components, all internal combustion engines consume a certain amount of engine oil. Oil consumption varies from engine to engine and may change significantly over the life of the engine. Typically engines with specified break-in periods consume more oil during the break-in period, and the oil consumption will stabilize after the break-in period. Refer to the Owner's Manual for specific break-in procedures. Under normal conditions, the rate of oil consumption depends on the quality and viscosity of the oil, the RPM at which the engine is operated, the ambient temperature and road conditions. Additional factors are the amount of oil dilution from water condensation or fuel residue and the oxidation level of the oil.
A191450 2025303-2017-11-08. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 13-41 dated June 20, 2013. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service.
A101310 2018288-2017-10-31. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 10 number 10-02 dated September 14, 2010. Prior to engine replacement, any debris lodged in transferred assemblies must be removed. If the vehicle's 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 pieces are not removed prior to the installation and operation of the replacement engine, the pieces may be drawn into the combustion chamber, which can cause a knocking noise and subsequent serious engine damage.
A011507 2028344-2017-10-25. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 01 number 13-69 dated February 14, 2013. Noises and inconsistent engine operation after cold start during the catalyst heating phase. The customer may misinterpret these symptoms as engine misfiring. This bulletin applies only to non-diesel engines.
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.
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
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
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
200365822007-07-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. LOSES POWER OR WILL NOT MOVE AFTER STOP. *KB
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

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