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Service bulletins for the 2021 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.

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

By type

By component

By trouble code

Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
A9022732052299_52022-07-01. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains repair instructions for proper transport mode deactivation (DTC U142100, DTC P169A00, and U13EB00 ).
SM 47-20222022-07-01. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
A9122032061028_42022-07-01. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin describes the registering and pairing process required to utilize the SIM card to activate 3rd generation Audi connect services.
SM 48-20222022-07-01. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
A0022562066297_12022-07-01. Service bulletin. EQUIPMENT. This bulletin describes a reporting program for Audi certified technicians.
A4522262067132_12022-06-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin contains instructions for when the message "Audi pre sense currently restricted. See owner's manual" is displayed in the instrument cluster without DTCs.
A9022592063038_22022-05-05. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin explains why the version information pops-up.
A9022572032113_62022-05-05. Service bulletin. EQUIPMENT:ELECTRICAL. This is an informational bulletin containing information about the outside temperature reading.
DC_202203292022-04-05. Service bulletin. EQUIPMENT. Dealer Communication: Vehicle Sales Reporting, Reinstatement, and Audit Policy
A9122892037809_92022-04-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This informational bulletin contains instructions about updating the navigation map.
A9022462052299_42022-03-04. Service bulletin. EQUIPMENT. This bulletin contains repair instructions for proper transport mode deactivation (DTC U142100, DTC P169A00, and U13EB00 ).
A4622282051095_52022-03-04. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin contains instructions on how to download and use the Audi Frequency App.
A1922282025303132022-02-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This bulletin contains instructions for identifying and mixing factory fill coolants.
A1922272025303122022-02-04. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT. This bulletin contains instructions for identifying and mixing factory fill coolants.
A4622272034181192022-02-04. Service bulletin. EQUIPMENT; SERVICE BRAKES; EQUIPMENT ADAPTIVE/MOBILITY. This technical service bulletin provides troubleshooting for brake noise.
A1921262061918_42022-01-05. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides guidance on diagnosing a coolant light concern with normal coolant level in the tank.
A9721822061976_22021-12-07. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin contains guidance for submitting warranty wiring repairs.
A4421842065160_12021-12-07. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; TIRES:TEMPORARY/EMERGENCY SPARE TIRE. This informational bulletin explains how the temporary/collapsible spare wheel inflates.
SM 77-20212021-11-05. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
DC 202109282021-10-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Dealer Communication - Vehicle Sales Reporting, Reinstatement, and Audit Policy Update - Effective September 30, 2021
A9121342018187_12021-10-05. Service bulletin. EQUIPMENT. This bulletin contains inspection guidelines for radio interference that causes noises in the speaker.
A9121332064292_12021-10-05. Service bulletin. EQUIPMENT. This bulletin contains repair instructions for when adjusting the MMI volume via the steering wheel controls, the volume sporadically and unintentionally goes all the way to min or max.
A9121312061028_32021-10-05. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin explains and troubleshoots when Audi connect does not have a green SOS light.
A8721162041717_72021-10-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This informational bulletin details on how to get a GFF test plan for A/C compressor replacements.
A0121102028842_32021-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin gives instructions for identifying chip tuning.

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