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Service bulletins for the 2019 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.

836 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
A1523442053278_92023-08-04. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information for when there is an oil leak from the cylinder head.
A6923922063398_32023-07-10. Service bulletin. SEAT BELTS. This bulletin provides information for when the seatbelt is hard to latch in the belt buckle.
A6923912056406_42023-07-10. Service bulletin. AIR BAGS. This bulletin provides information for when the airbag warning light is on and DTC B13BCF2 is stored in the airbag control module.
A9123092055945132023-07-10. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information for when the SOS Emergency call function deactivated message appears in the instrument cluster; DTC U153E00 is stored in the telematics module.
A4823502063528_42023-07-10. Service bulletin. STEERING. This bulletin provides information for when noises are heard inside the vehicle via the intermediate steering shaft.
A4823492061904_52023-07-10. Service bulletin. STEERING. This bulletin provides information for when the yellow steering malfunction light is on in the cluster and DTC C110DF0 is stored in the active steering module.
A4823452065871_32023-07-10. Service bulletin. STEERING. This bulletin provides information for when there is an active steering malfunction with DTC B200FF0.
A9123082056076182023-07-10. Service bulletin. COMMUNICATION:MANUFACTURER TELEMATICS. Ths bulletin provides information for when no diagnostics communication to the telematics control module; DTC U142100 may be stored.
A4823432055733_42023-07-10. Service bulletin. STEERING. This bulletin provides information for when there are squeaking noises from the rubber boot of the intermediate steering shaft.
A9123072064681_32023-07-10. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT; EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information for when wireless charging with the Audi Phone Box does not work.
A1023262018288102023-07-10. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information on checking for debris when replacing an engine.
A9123062010146_82023-07-10. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information for when an unpleasant odor is coming from the heating and ventilation system.
A4623452070679_12023-07-10. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK. This bulletin provides information for when one or more DC is stored in the ABS control unit related to the parking switch; DTC C100C07 and/or C100C29.
A4823412028220_12023-07-10. Service bulletin. STEERING: STEERING WHEEL/HANDLE BAR. This bulletin provides information for instances where the steering wheel leather is damaged.
A8723442010146_82023-07-10. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information for when an unpleasant odor is coming from the heating and ventilation system.
A9423652061922_32023-07-10. Service bulletin. EXTERIOR LIGHTING. This bulletin provides detailed information on the proper documentation of optical concerns for headlights and taillights.
A9123052068573_22023-07-10. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SENSORS. This bulletin provides information for when the parking aid sensor bracket(s) separate from the rear bumper.
A9123042056076172023-07-10. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information for when there is no communication to the telematics control module.
A9123032070046_22023-07-10. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information for when the emergency call warning appears in the instrument cluster when leaving an area of cellular coverage.
A6923902051242_72023-07-10. Service bulletin. AIR BAGS. This bulletin provides instructions for when the airbag light is illuminated in the DIS, and may also be illuminated in the overhead console, and it is accompanied by DTC B122551.
A5723082027406_52023-07-10. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. This bulletin provides information regarding the Audi advanced key.
A5523762062730_32023-07-10. Service bulletin. STRUCTURE:BODY:TRUNK LID; STRUCTURE. This bulletin provides information for when the luggage compartment lid cannot be closed using the button(s) in the luggage compartment trim.
A2723562069747_32023-07-10. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides additional diagnostic instructions for when the vehicle does not start due to a drained 12v battery (A).
A7223472064695_22023-06-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides information on the operation of the entry/exit assistance feature.
A9223352038151142023-06-06. Service bulletin. VISIBILITY:REAR WINDOW WIPER/WASHER. This bulletin provides instructions for when the washer level warning is on but the reservoir is full.

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