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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

Bulletins, newest first
40122720243182024-02-26. Service bulletin. WHEELS; BACK OVER PREVENTION. Clicking noise from wheel bearing
45120620319892024-02-20. Service bulletin. SERVICE BRAKES. DTC stored after replacing ABS unit (DTC 01044)
44133620225632024-02-20. Service bulletin. STEERING. Steering wheel shimmy, vibration and/or oscillation
40122620243182024-02-20. Service bulletin. WHEELS; BACK OVER PREVENTION. Clicking noise from wheel bearing
37126720280532024-02-20. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). TCM software update for downshift concerns
37126420306482024-02-20. Service bulletin. ENGINE AND ENGINE COOLING. Engine speed increases when driving downhill, vehicle speed is not increased - CVT transmission
27121520311452024-02-20. Service bulletin. ELECTRICAL SYSTEM. Excessive Voltage DTCs present in multiple control units
27121420311452024-02-20. Service bulletin. ELECTRICAL SYSTEM. Excessive Voltage DTCs present in multiple control units
21121020312452024-02-20. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. P0299 Negative pressure deviation, turbocharger excessive wastegate play
17123220185502024-02-20. Service bulletin. ENGINE AND ENGINE COOLING. Oil consumption measurement - Repair Authorization (CA)
15122520310852024-02-20. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). MIL on. One or several of the following DTCs for the cam actuators are stored in ECM memory
01136920283442024-02-20. Service bulletin. ENGINE AND ENGINE COOLING. Idle speed characteristic during cold start
01125720283442024-02-20. Service bulletin. ENGINE AND ENGINE COOLING. Idle speed characteristic during cold start
01125620313682024-02-20. Service bulletin. FUEL SYSTEM, GASOLINE. Unnecessary High Pressure Fuel Pumps replacement due to Guided Fault Finding test plans not being performed or interrupted when the following DTC? s are present in the engine control module:
Edition812024-02-12. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Elsa newsletter
Update91i82024-01-22. Service bulletin. UNKNOWN OR OTHER. Google Maps Street View (NVLW))
AWA14052024-01-22. Service bulletin. UNKNOWN OR OTHER; FUEL SYSTEM, DIESEL. Due to new Minnesota state regulations regarding biofuels, biodiesel blends of B5 or less may not be available in the State of Minnesota.
AUD4927ENG2024-01-22. Service bulletin. UNKNOWN OR OTHER. Due to new Minnesota state regulations regarding biofuels, biodiesel blends of B5 or less may not be available in the State of Minnesota.
A9123062024323102024-01-04. Service bulletin. ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SENSORS; ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SOFTWARE. This bulletin provides information when the parking assistance provides false warnings.
A9023562032113_82023-12-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides general information about the outside air temperature reading.
A0023812070568_22023-12-06. Service bulletin. EQUIPMENT. This bulletin provides information on the VAS 611 015 PICO-NVH tool for professional noise analysis.
A9423672071954_12023-11-06. Service bulletin. EXTERIOR LIGHTING:TAIL LIGHTS; EXTERIOR LIGHTING:HEADLIGHTS. This bulletin provides information pertaining to when there are foreign objects inside of a headlight or taillight.
A7423262071893_12023-11-06. Service bulletin. EQUIPMENT:OTHER:LABELS. This bulletin provides damage assessment guidelines for textile seat covers.
A0123812028842_42023-11-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides instructions regarding unauthorized chip tuning (TD1).
A0023762071721_12023-11-06. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information for when unauthorized/unjustified DTC memory entries are captured in ODIS test Plans (Ghost faults).

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