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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
A0120772045673_42020-09-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE. This bulletin provides instructions regarding an SVM update needed when a DTC is stored in the engine control module.
A9120952055591_32020-09-03. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin contains a software update for when the MMI screens go blank and the system reboots, it may have stored DTC U10CF00 and/or B13B901.
A9120942045106_62020-09-03. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This bulletin provides instructions on how to properly replace a coaxial connection if it is damaged.
2010-2021EngOil2020-09-03. Service bulletin. ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. New document
Audi Part Labels2020-09-03. Service bulletin. EQUIPMENT. Recall Reminder Part Labels
A9120902060346_12020-09-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains instructions for creating a PSS record when the satellite map setting is lost.
A6620662060333_12020-09-03. Service bulletin. STRUCTURE. This bulletin contains instructions for when the black optic trim is discolored.
A9120892047576_42020-08-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This informational bulletin contains software instructions for vehicles with MIB2 with Navigation plus.
A4020132059474_22020-08-06. Service bulletin. SUSPENSION:FRONT:SHOCK ABSORBER; EQUIPMENT. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end).
A3020272060101_22020-08-06. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:GEARS. This bulletin contains instructions for DTCs P181C00, P181E00, and P181E00 with Start-Stop not working or a message appearing.
A0120732058890_22020-08-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING. This bulletin contains instructions for replacing a part or performing a software update for DTC P000000.
A4020122047920_52020-08-06. Service bulletin. SUSPENSION:FRONT:WHEEL BEARING; STEERING. The bulletin contains diagnosis information for noises on the front end of the vehicle. Potential rolling sounds.
A3920342060169_12020-08-06. Service bulletin. EQUIPMENT; POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT. This bulletin contains instructions for when DTC U101300 is logged with sports differential warning lamps or messages.
A3020262060101_12020-08-06. Service bulletin. ENGINE; POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:GEARS. This bulletin contains instructions for DTCs P181C00, P181E00, and P181E00 with Start-Stop not working or a message appearing.
A1020192059446_22020-08-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PIPES, HOSES, AND FITTINGS. This bulletin contains repair instructions for oil loss found in the engine compartment.
A1720062028440_52020-08-06. Service bulletin. ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE:FUEL LEVEL FLOAT/SENSOR/SENDING UNIT. This informational bulletin explains when the range display is empty in the on-board computer.
A1920042025303_12020-07-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for identifying and mixing factory fill coolants.
A9120812052251_42020-07-07. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin contains software update instructions for when the audio is distorted from door speakers or subwoofer.
A9020542059891_12020-07-07. Service bulletin. ELECTRICAL SYSTEM:IGNITION. This informational bulletin directs you to read the SSP and not perform any repairs for the concern.
A9120782057052_32020-07-07. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin contains instructions for when the MMI shows the message 'Read error occurred when accessing the navigation data' after initialization and reboots constantly with DTC B126CF0 and/or B126CF1.
A9020522059863_12020-07-07. Service bulletin. EQUIPMENT. This informational bulletin contains instructions for when the message "Audi pre sense currently restricted. See owners manual" is displayed in the instrument cluster without DTCs.
A9020512058077_42020-07-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains instructions for determining unexpected Audi pre sense interventions.
A3920322051558_32020-07-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains repair instructions for when the message "four-wheel drive malfunction" shows up sporadically in the instrument cluster with DTC C05ED00.
A9120762042506102020-07-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL. This technical service bulletin explains how to determine the status of activation keys (that affect the function of Audi drive select, cruise control, navigation, Bluetooth, smartphone interface and voice recognition), and how to update them.
A9120722037809_62020-07-07. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin contains instructions about updating the navigation map.

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