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Service bulletins for the 2020 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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
A6420742020552_92020-06-04. Service bulletin. VISIBILITY:WINDSHIELD; EQUIPMENT. This bulletin provides instructions on how to clean exterior glass.
A4220442038689_42020-06-04. Service bulletin. EQUIPMENT; SUSPENSION. This bulletin contains information on how to fix a clunking or rattling noise heard from the rear suspension when the vehicle is driven over bumps.
TT 91 18 062020-06-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Apple car play function.
A4020062059474_12020-06-04. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; SUSPENSION. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end).
A0020372059437_12020-06-04. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY. The informational bulletin explains why during COVID-19 there is winter-blend fuel during a warmer season and causing some issues.
A8720052010146152020-05-07. Service bulletin. EQUIPMENT:RECREATIONAL VEHICLE/TRAILER:LPG SYSTEMS:WATER HEATER. This bulletin contains instructions for properly cleaning and removing a musty odor in the vehicle.
SM 25-20202020-05-07. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
A9020452059335_12020-05-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information on noises from the instrument cluster installation area.
A9020442032113_32020-05-07. Service bulletin. ELECTRICAL SYSTEM. This information bulletin contains a background on the outside air temperature reading.
20TechRefREV4202020-05-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. The Pre-Delivery Inspection Technician Reference Document is designed to be a resource used in hand with the Pre-Delivery Inspection Checklist (PDI). The PDI Checklist has been simplified to make the process more efficient, and in doing so, this document has been created to be used as a reference for checklist items that may have additional information. On the PDI Checklist, you find that certain items have been notated with an asterisk symbol (*), this lets you know that additional information can be found in this Technician Reference Document.
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.
A5120132009967_12020-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for vehicle inspection, protection removal, and detailing.
20TT-TECHREPORT2020-04-02. Service bulletin. EQUIPMENT. Reminders Section: Changed Testing verbiage to: - Guided Fault Finding must be used, session must be completed and sent to GFF Paperless - Total PDI Test must be completed prior to any other work involving the scan tool (special function tab -> Total PDI Test) - Start Guided Fault Finding with the engine running to insure control modules in transport mode are identified
20TIREPRSCHRT032020-04-02. Service bulletin. TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. Added tire pressures for SQ7, SQ8, & RS Q8
20AUUSMnt226202020-03-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Standard Maintenance Section: Plenum chamber and water drain valves: Check for dirt. ADDED: A6 all models, A7 all models
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.
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.
20AUUSMaint02202020-03-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Standard Maintenance Section: Connected Battery Box: ADDED: SQ7, SQ8 Additional Maintenance Items section: Fragrance Cartridges: ADDED: SQ7, SQ8 Rear axle, quattro® Sport - Change ATF and differential oil: ADDED: SQ7, SQ8 Spark plugs - Replace every 30,000 miles: ADDED: SQ7, SQ8 OIL CAPACITY CHART: ADDED: SQ7, SQ8 CHANGED: Castrol Oil to 'Audi High Performance Genuine Engine Oil'
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.
20AUUSMaint01302020-02-08. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Standard Maintenance Items section: ADDED to Connected box battery '(for Audi Connected Services)'
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.
20TechRefREV1242020-02-08. Service bulletin. STRUCTURE. Added A8 e & Q5 e to titles & index
A9020362058077_22020-02-08. Service bulletin. SERVICE BRAKES; EQUIPMENT. This bulletin contains instructions for determining unexpected Audi pre sense interventions.

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