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Service bulletins for the 2011 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.

543 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
26 13 18 20279452022-05-02. Service bulletin. ENGINE AND ENGINE COOLING. Humming or metallic rattling noise from under the vehicle, heard most consistently during engine idle or slow acceleration. Initial inspection indicates that the noise is coming from the exhaust system. Relative movements in the rear mounting of the exhaust system (rear silencer).
24 14 50 20382122022-05-02. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. Possible incorrect function on the sensor elements of the air mass meter.
A1722172060750_32022-04-05. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for using the UV additive to find engine oil leaks.
A1922282025303132022-02-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This bulletin contains instructions for identifying and mixing factory fill coolants.
A1922272025303122022-02-04. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT. This bulletin contains instructions for identifying and mixing factory fill coolants.
9013422035902 12021-12-13. Service bulletin. ENGINE AND ENGINE COOLING. 90 "Ignition lock faulty" message in cluster information display.
1913462033491 52021-12-13. Service bulletin. ENGINE AND ENGINE COOLING. Customer may report coolant leaking from the engine area.
1713462030197 122021-12-13. Service bulletin. ENGINE AND ENGINE COOLING. Upon customer complaint of excessive engine oil consumption.
A1921182061604_42021-06-03. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This bulletin contains instructions for resolving a coolant leak.
A1021222018288_92021-06-03. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. This technical service bulletin reminds the reader to check for metal debris when replacing an engine.
A1921152061604_32021-05-06. Service bulletin. ENGINE. This bulletin contains instructions for resolving a coolant leak.
A1921142061604_22021-04-06. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for resolving a coolant leak.
A1721122060750_22021-03-04. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for using the UV additive to find engine oil leaks.
A5520512014055_82021-01-08. Service bulletin. EQUIPMENT; ENGINE; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin contains instructions for addressing discoloration due to moisture on a new vehicle.
A1920102061604_12021-01-08. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for resolving a coolant leak.
A1720112060750_12020-11-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION; EQUIPMENT. This bulletin contains instructions for using the UV additive to find engine oil leaks.
A9020652032113_42020-09-03. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:COOLING SYSTEM. This information bulletin contains a background on the outside air temperature reading.
A1920042025303_12020-07-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for identifying and mixing factory fill coolants.
A0020372059437_12020-06-04. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY. The informational bulletin explains why during COVID-19 there is winter-blend fuel during a warmer season and causing some issues.
AWA 19-062020-01-08. Service bulletin. ENGINE; EQUIPMENT. The communication contains the details of the water pump extended warranty.

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