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Service bulletins for the 2018 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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
A4824642063546_42024-04-04. Service bulletin. STEERING. This bulletin provides information on the identification of noises in the dynamic steering.
A9424742073332_12024-04-04. Service bulletin. UNKNOWN OR OTHER; STEERING. This bulletin provides information if there is noise when steering the vehicle.
A9424722073282_12024-04-04. Service bulletin. UNKNOWN OR OTHER; EXTERIOR LIGHTING:HEADLIGHTS. This bulletin provides information on visual concerns with the headlight lens.
A4624552061403_22024-04-04. Service bulletin. SERVICE BRAKES, AIR:DISC:PADS; UNKNOWN OR OTHER. This bulletin provides information for when the brake pad wear indicator is on in the instrument cluster.
A1924552061918_62024-04-04. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:THERMAL MANAGEMENT:FLUID/COOLANT; UNKNOWN OR OTHER. This bulletin provides information when the low coolant light is on but the coolant level is within specifications.
A9124802055591_62024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for vehicles when the infotainment system sporadically reboots.
A9124792053028_52024-03-06. Service bulletin. BACK OVER PREVENTION: CAMERA SYSTEM. This bulletin provides information when the top view camera setting changes to graphic view intermittently after startup with MIB2.
A9124782055026_72024-03-06. Service bulletin. BACK OVER PREVENTION: CAMERA SYSTEM. This bulletin provides information for certain vehicles when the rearview camera/overhead view camera does not turn on.
A5524892062669_32024-03-06. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE:SUPPORT DEVICE/STRUT; UNKNOWN OR OTHER. This bulletin provides information when there are noises coming from the trunk lid struts.
A3924582059057_72024-03-06. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). This bulletin provides information when quattro Ultra has vibrations or binding in tight turns.
A9124682072959_12024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Apple CarPlay pops up or takes over audio without user intervention in vehicles with the Audi Smartphone Interface.
A9124632044694_32024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin provides information pertaining to MMI Navigation database concerns.
A4324812067531_32024-03-06. Service bulletin. SUSPENSION. This bulletin provides information when DTCs B200FF0, B200FF1, B200FF3, or B200FF4, B200FF5 are stored in the J775 suspension control unit.
A1924492061918_52024-03-06. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information for when the low coolant light is illuminated but the coolant level is within specifications.
441342202256372024-03-04. Service bulletin. SUSPENSION. Steering wheel shimmy, vibration and/or oscillation
A3924572059129_52024-02-06. Service bulletin. STRUCTURE. This bulletin provides information regarding noises and/or vibrations in tight turns.
A4224552058459_22024-02-06. Service bulletin. STRUCTURE. This bulletin provides information when there are noises from the rear shock absorber mounting.
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.
A0023822047812_72024-01-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information on how to set up and use the SD Creator for obtaining vehicle software updates via the Mirror Server.
A4723262055646_62024-01-04. Service bulletin. UNKNOWN OR OTHER; SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. This bulletin provides information for when there is a hard brake pedal while attempting to start the vehicle.
A4523362072304_12024-01-04. Service bulletin. UNKNOWN OR OTHER; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; ELECTRICAL SYSTEM:ADAS:HILL DESCENT ASSIST:SENSOR. This bulletin provides information for when the ABS/ESC speed sensor has an implausible signal.
A1923462070349_32024-01-04. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:ENGINE COOLANT HOSES AND FITTINGS; UNKNOWN OR OTHER. This bulletin provides information when there is a loss of coolant from the coolant pump - V6 TFSI.
A9023562032113_82023-12-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides general information about the outside air temperature reading.
A9023532058077_82023-12-06. Service bulletin. SERVICE BRAKES; BACK OVER PREVENTION: WARNINGS. This bulletin provides information for when there is a warning, warning jolt and/or brake engagement with Audi pre sense.

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