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Service bulletins for the 2018 Audi TT

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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
A6420722047061_22020-05-07. Service bulletin. STRUCTURE. This bulletin contains a cleaning procedure from leftover residue from suction cups or labels.
SM 21-20202020-05-07. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
A0120542014753112020-05-07. Service bulletin. FUEL SYSTEM, GASOLINE. This bulletin contains instructions for when to add gasoline additives for cleaning the injectors.
A5120132009967_12020-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for vehicle inspection, protection removal, and detailing.
A9420202017806132020-04-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information regarding when the message 'Vehicle lights: malfunction' appears with DTC 03280, 01800, or B126AF0.
A4820852053869_32020-04-02. Service bulletin. STEERING. This bulletin contains repair instructions for when DTC B145504 with symptom code 7340800. 48 Steering wheel heater is not working, DTC B145504 is stored in the steering column control module.
A0120462014753102020-04-02. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. This bulletin contains instructions for when to add gasoline additives for cleaning the injectors.
A9120392018187112020-03-05. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This bulletin contains inspection guidelines for radio interference that causes noises in the speaker.
A9120372057052_22020-03-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). 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.
A4420732056386_32020-03-05. Service bulletin. STEERING: STEERING WHEEL/HANDLE BAR. This bulletin contains instructions for when the vehicle pulls to one side or the steering wheel is crooked.
18AUUSMaint02202020-03-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. OIL CHART SECTION: CHANGED - Castrol Oil to 'Audi approved XXXX-Refer to the Parts Catalog' for all models.
A9120342042506_92020-03-05. Service bulletin. EQUIPMENT. 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.
18AUUSMaint01302020-02-08. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Additional Maintenance Section: ADDED to Battery - Connected gateway 'for Audi Connected Services' (if applicable)
SM 01-20202020-02-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This special notice is to inform dealers to return all parts listed and only use the superseded part numbers going forward.
A9020372058077_32020-02-08. Service bulletin. EQUIPMENT. This bulletin contains instructions for determining unexpected Audi pre sense interventions.
A9020362058077_22020-02-08. Service bulletin. SERVICE BRAKES; EQUIPMENT. This bulletin contains instructions for determining unexpected Audi pre sense interventions.
A9119252056232_22020-01-08. Service bulletin. EQUIPMENT. This informational bulletin contains instructions for creating a PSS record when the FPK (Free-Programmable Kombi/Cluster) screen goes blank intermittently when viewing the Audi Smartphone Interface (ASI) screen.
A9119232037809_52020-01-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This informational bulletin contains instructions about updating the navigation map.
A9219242038151112020-01-08. Service bulletin. EQUIPMENT; VISIBILITY:WINDSHIELD WIPER/WASHER. This bulletin provides instructions for repairing a vehicle with a washer solvent light on but the level is correct.
A9119202058094_12020-01-08. Service bulletin. EQUIPMENT. This bulletin contains instructions for when the audio sounds distorted. 2016,2017,2019 TTRS
SM 122-20192020-01-08. Service bulletin. EQUIPMENT. The part numbers listed in the document are to be returned and only the superseded part numbers going forward.
SM 121-20192020-01-08. Service bulletin. EQUIPMENT. The part numbers listed in the document are to be returned and only the superseded part numbers going forward.
A9419182012749_12020-01-08. Service bulletin. EXTERIOR LIGHTING; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Exterior lights, moisture accumulation 2013-2021 A3 Cabriolet, 2016-2018 Sportback, 2004-2005 A4 Cabriolet, 2004-2008 S4 Cabriolet, 2008 RS4 Cabriolet, 2010-2021 A4 allroad, 2018-2021 A5 Sportback, 2010-2012, 2018-2021 RS5 Cabriolet, 2018-2021 S5 Sportback, 2004-2006 A7, 2004-2011 S7, 2021 RS6 Avant, 2004-2006 S8
A9119162042506_82020-01-08. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. 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.
A0019292031473_22020-01-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin contains instructions for when car wash bristles are stuck in the headlights. 2015-2021 A3 Cabriolet, 2015-2018 A3 e-tron, 2011-2021 A4 allroad, 2018-2021 A5 Sportback, 2011-2012 and 2018-2021 RS5 Cabriolet, 2018-2021 S5 Sportback, 2021 RS6 Avant

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