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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.

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
TSB-01-10-132011-02-12. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: MIL ON; ROUGH IDLE; ONE OR MORE OF THE FOLLOWING DTCS ARE STORED-DTC P0300 (RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED); DTC P0301-0312 (CYL. 1 MISFIRE DETECTED-CYL.12 MISFIRE DETECTED); ENGINE MAY HAVE REDUCED PERFORMANCE WITHOUT SIGNIFICANT LOSS OF POWER OR STALLING. *PE
TSB-01-10-092011-02-12. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: MIL ON; ROUGH IDLE, ONE OR MORE OF THE FOLLOWING DTCS ARE STORED-DTC P0300 RANDOM/MULTIPLE CYLINER MISFIRE DETECTED; DTC P0301-0312 (CYL. 1 MISFIRE DETECTED-CYL. 12 MISFIRE DETECTED); ENGINE MAY HAVE REDUCED PERFORMANCE WITHOUT SIGNIFICANT LOSS OF POWER OR STALLING. *PE
TSB-15-09-042011-02-08. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM:STARTER ASSEMBLY:SOLENOID. AUDI: ONE OF THE FOLLOWING DTCS WILL BE STORED: CRANKSHAFT POSITION-CAMSHAFT POSITION CORRELATION BANK 1 SENSOR A & B; CRANKSHAFT POSITION-CAMSHAFT CORRELATION BANK 2 SENSOR A & B; A SLIGHT POWER REDUCTION MAY BE ASSOCIATED WITH THIS CONDITION. THIS CONDITION DOES NOT CAUSE STALLING. *PE
TSB-17-09-162010-08-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: ENGINE STALLS OR IDLES ERRATICALLY IMMEDIATELY AFTER COLD START IN EXTREMELY COLD WEATHER (BELOW 20%F). *PE
TSB-21-10-012010-06-25. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. AUDI: IT IS POSSIBLE THAT THE COOLANT SUPPLY LINE AT THE TURBOCHARGER MAY LEAK ON AUDI VEHICLES WITH 2.0L TFSI ENGINES BUILT WITHIN A SPECIFIC PERIOD. *PE
TSB-21-10-022010-06-25. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. AUDI: IT IS POSSIBLE THAT THE COOLANT SUPPLY LINE AT THE TURBOCHARGER MAY LEAK ON VEHICLES WITH 2.0L TFSI ENGINES BUILT WITHIN A SPECIFIC PERIOD. *PE
TSB-15-09-022009-10-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: ENGINE OIL MAY BE LEAKING FROM UPPER ENGINE AREA. DUE TO THE POROSITY OF THE CAM CARRIER CASTING, OIL CAN DRAIN INTO THE THREAD OF THE CAM BOLT AND CAUSE AN EXTERNAL ENGINE LEAK. ALL BOLTS ARE INSTALLED WITH LOCTITE. *PE

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