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Service bulletins for the 2018 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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
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.
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.
A7223462069350_12023-06-06. Service bulletin. ELECTRICAL SYSTEM; SEATS. This bulletin provides information for when the starter battery is discharged, and the vehicle cannot be started due to the front adjustment seat switch becoming jammed.
A4323742059665_52023-06-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides an SVM update for when the warning light for the suspension appears in the instrument cluster, and the SVM registers an unknown event when carrying out "Check control unit configuration" and cannot be automatically parameterized.
A4323732051336_72023-06-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin advises that if the warning lamp for the damper control in the instrument cluster is on, and DTC B200FF0 is stored to delete the DTC and perform suspension basic settings.
A4323722067531_22023-06-06. Service bulletin. SUSPENSION; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides information for when the messages "Air suspension: system fault" or "Shock absorber system/suspension" is shown in the instrument cluster, and one or more of the following DTCs are stored B200FF0, B200FF1, B200FF3, B200FF4, B200FF5.
A0023702021205_72023-06-06. Service bulletin. EQUIPMENT:OTHER:LABELS. This bulletin provides instructions for ordering replacement Safety Certification labels or VIN plates.
A0023692031473_42023-06-06. Service bulletin. STRUCTURE; EXTERIOR LIGHTING:HEADLIGHTS. This bulletin provides information for when car wash bristles become stuck in the body gap between the headlight and fender.
A3923542048671_62023-06-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides a software update for when "All Wheel Drive Malfunction Message" is displayed in the instrument cluster and DTC U030000 is logged.
A3423632070167_12023-06-06. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). This bulletin provides instructions for when DTC P1A5B00 is stored after replacing the transmission control module or valve body for another concern.
A0023682066297_22023-06-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides information to Audi technicians regarding the VIN-4-PIN bonus program.
A9423632061922_22023-06-06. Service bulletin. EXTERIOR LIGHTING. This bulletin provides details on how to properly document optical concerns in headlights and taillights for warranty submissions.
A9123942018187132023-06-06. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information for when the customer advises that there is cracking, grinding, rattling, humming, whining, or similar interference.
A9423642012749162023-06-06. Service bulletin. EXTERIOR LIGHTING. This bulletin provides information for when there is moisture accumulation in the exterior lights.
DC_AudiRingsV122023-05-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Inside the Rings | Volume 12, Spring 2023
A9023242054505_42023-05-05. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. This bulletin provides instructions for when the sunroof glass panel, or the sunroof rollershade does not operate properly.
A7023812044417_92023-05-05. Service bulletin. STRUCTURE. This bulletin provides information for when a rattling noise is heard from the headliner area.
A4623432069904_12023-05-05. Service bulletin. SERVICE BRAKES; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; UNKNOWN OR OTHER. This bulletin provides information for when there are noises when braking, and the brake pad thickness is OK.
A4423992056386_92023-05-05. Service bulletin. STEERING. This bulletin contains instructions for when the vehicle pulls to one side or the steering wheel is crooked.
A4423982056386_82023-05-05. Service bulletin. STEERING. This bulletin contains instructions for when the vehicle pulls to one side or the steering wheel is crooked.
A2723532069916_12023-05-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information related to maintaining the 12V Lead-acid or AGM battery when a vehicle is parked for a prolonged period of time.
A6623982046229_42023-05-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides information on how to document optical defects in order to submit to Warranty.

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