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Service bulletins for the 2009 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.

775 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
2027731/52016-05-19. Service bulletin. ENGINE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-2031245/12016-05-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-2031085/12016-05-09. Service bulletin. ENGINE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
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
20367642014-07-09. Service bulletin. ENGINE. MOTRONIC ENGINE CONTROL POWER SUPPLY ISNT FUNCTIONING PROPERLY. 07/09/14*LJ
TSB-01-14-632014-03-19. Service bulletin. ENGINE. AUDI: THE ENGINE WOULD HAVE A ROUGH IDLE, DIFFERENT MISFIRE FAULTS OR REDUCED PERFORMANCE WITHOUT LOSS OF POWER OR STALLING, THAT CAUSES THE MALFUNCTION INDICATOR LAMP (MIL) ON. MODEL 2008-2015 A3, A4, ALLROAD, TT, A5, A5 CABRIOLET, Q5, A6. *PE
SB-483262013-12-06. Service bulletin. ENGINE. AUDI: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION PROVIDED REGARDING WARRANTY EXTENSION ON CARBON BUILDUP REMOVAL, ENGINE CYLINDER HEAD SECONDARY AIR PORTS. MODELS 2009-2012. NO MODEL PROVIDED. *PE
TSB-19-13-422013-12-03. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING. AUDI: THE CONNECTION OF WATER PUMP AND HOSE, ON SOME VEHICLES, LEADING TO HEATER CORE, HAS A COOLANT LEAKAGE FROM ENGINE AREA AND SEAL RING IS NOT THE CAUSE. MODEL 2009-2013 A4, A5, Q5, A6. *PE
TSB-21-13-142013-08-08. Service bulletin. ENGINE. AUDI: ON SOME VEHICLES THE TURBOCHARGER WASTE GATE FLAP IS LOOSE. DTC P0299 IS STORED. *JS UPDATED 12/2/13. *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
TSB-21-12-102012-12-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. AUDI: EXCESSIVE WEAR FROM LINKAGE FOR WASTE GATE ACTUATION, LEADS TO PLAY AT THE WASTE GATE FLAP CAUSING BOOST ESCAPING THROUGH LOOSE FLAP OF TURBOCHARGER. MODELS 2009-2010 A4, A5, A5 CAB. *PE 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-21-12-072012-04-07. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. AUDI: ON THE TURBOCHARGER ENGINE, THE COOLANT SUPPLY LINE MAY LEAK, WITHIN A SPECIFIC PERIOD AND NEEDS TO BE REPLACED. *PE
SB-20092012-02-09. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). AUDI: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION PERTAINING TO CERTAIN VEHICLES REGARDING POSITIVE CRANKCASE VENTILATION (PCV) VALVE EXTENSION WARRANTY. *PE
SB-BPGBPYBWT2012-02-09. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); ENGINE AND ENGINE COOLING:ENGINE. AUDI: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION PERTAINING TO CERTAIN MODEL VEHICLES WITH 2.0L ENGINE CRANKCASE VENTILATION (PCV) VALVE AND INTAKE MANIFOLD RUNNER CONTROL MOTOR WARRANTY EXTENSION. *PE
TSB-24-11-932011-12-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE. AUDI: UPDATE OF SERVICE SOFTWARE. THERE IS A LOW/UNEVEN ENGINE PERFORMANCE AND A LOSS OF ENGINE POWER. MODELS A4, A5, A5 CABRIOLET AND AUDI Q5
TSB-15-11-192011-08-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VOLKSWAGEN: MALFUNCTION LIGHT IS ON AND THE ENGINE IS DIFFICULT TO START. THERE MAY BE A RATTLE IN THE ENGINE COMPARTMENT AND POSSIBLE DAMAGE TO THE CAMSHAFT. THERE ARE TWO POSSIBLE TROUBLE CODES STORED. *RM
SB-15-11-212011-06-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VOLKSWAGEN: MALFUNCTION LIGHT IS ON AND THERE IS NOISE FROM THE TIMING CHAIN. ENGINE IS DIFFICULT TO START AND THERE ARE TWO POSSIBLE TROUBLE CODES STORED. THERE IS POSSIBLE DAMAGE TO THE CAMSHAFT. *RM
SA-19H12011-06-22. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING. AUDI SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. A SEAL INSIDE THE COOLANT PUMP CAN WEAR OUT AND LEAK COOLANT. THIS ALSO CAUSED THE ENGINE LIGHT TO COME ON. *RM UPDATED ON 06/27/2011. *KB
TSB-38-11-052011-06-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: TRANSMISSION PROBLEMS RESULTING IN A DELAYED ENGAGEMENT WHEN COLD OR NO DRIVE ON FIRST ENGAGEMENT. *RM
SB-24-10-612011-06-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VOLKSWAGEN: MALFUNCTION LIGHT IS ON WITH MISFIRE CODES. THERE IS A SOFTWARE UPDATE. *RM
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-15-10-042011-02-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: MIL ON; NOISE FROM TIMING CHAIN (DTC P001600). MIL ON; ENGINE DIFFICULT TO START; SOMETIMES RATTLE IN ENGINE COMPARTMENT; BANK 1, CAMSHAFT POSITION G40/CRANKSHAFT POSITION SENSOR G28, WRONG ASSIGNMENT STORED IN ENGINE CONTROL UNIT; POSSIBLE DAMAGE TO CAMSHAFT OR CAMSHAFT BEARING SURFACES. *PE

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