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Service bulletins for the 2018 Audi A3

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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
A3723082060146_32023-04-06. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains a software update that addresses a brief but sudden increase in engine speed without DTCs or leaks.
A4023502043424_12023-03-06. Service bulletin. SUSPENSION. This bulletin provides information for when creaking/squeaking noises are heard from the left front or right front area of the vehicle when driven on uneven roads.
A9623822056019_22023-03-06. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:CONTROL MODULE. This bulletin provides instructions for when the anti-theft alarm has gone off for no reason, or did not go off at all. No DTCs are stored.
A9023042069416_12023-03-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin provides information for when the 12V socket and/or the cigarette lighter are not working.
A4623412034181232023-03-06. Service bulletin. SERVICE BRAKES. This bulletin provides instructions for brake noise analysis and handling.
A0123412014753122023-03-06. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. This bulletin contains instructions for when to add gasoline additives for cleaning the injectors.
A92233320381512023-03-06. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. This bulletin provides instructions for when the washer solvent level warning is on in the DIS but the washer solvent level is correct.
DC_Alternator_52023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
DC_Alternator_42023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
DC_Alternator_32023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
DC_Alternator_62023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
A6623942049680_22023-02-07. Service bulletin. STRUCTURE. This bulletin provides instructions for when the exterior trim has spots.
A6423862047061_42023-02-07. Service bulletin. VISIBILITY:WINDSHIELD. This bulletin provides instructions for when faint images appear on the windshield from the production sticker, or an image of the suction cups used to install the windshield in production.
A6623952060333_32023-02-07. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT; STRUCTURE. This bulletin provides instructions when the black optic exterior trim is discolored.
A4423972022563_22023-02-07. Service bulletin. VEHICLE SPEED CONTROL. This bulletin provides instructions for when a vibration is felt in the floor, seat, footwell, pedals or steering wheel while driving at highway speeds from 55 - 80 mph.
Dealer 24Wi2023-02-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. RECALL - Engine Control Module (ECM) Software
DC_Alternator_22023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
Circular 24Wi2023-02-07. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. RECALL - Engine Control Module (ECM) Software
A9123592036576_72023-02-07. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin advises that the MMI screen may freeze, or go blank and then restart when a special character like a symbol or emoticon is used in the name field for contact(s).
A8023122062583_22023-02-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides instructions for when the customer advises that there is insufficient or uneven cabin heating from the HVAC system.
A5123262068999_12023-02-07. Service bulletin. STRUCTURE. This bulletin provides instruction for when a customer advises that a visible line of corrosion is forming in the roof.
A4623402069078_12023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for when the zirconium inserts found to be not firmly attached during service work.
A3023322060560_22023-02-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); STEERING:GEAR BOX (OTHER THAN RACK AND PINION). This bulletin provides instructions for when the clutch slips when pulling away, or the gearbox malfunction appears in the instrument cluster, or the vehicle shudders when shifting to odd-numbered gears with various DTCs stored in the TCM.
A2023522065287_62023-02-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). This bulletin provides instructions for when the MIL is on and DTC P044200 and/or P045600 is stored in the ECM.
DC_Alternator2023-01-06. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. Support for Customers Affected by Alternator Back-order

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