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
| A9120852046489_4 | 2020-08-06. Service bulletin. EQUIPMENT:ELECTRICAL; STRUCTURE:BODY:DOOR; EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS. This bulletin contains information on how to diagnose if the speakers have a hardware restriction that causes them to sound like they have been blown. |
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| A3920332043144_7 | 2020-08-06. Service bulletin. POWER TRAIN:DRIVELINE:HYDRAULIC:MOTOR/PUMP; ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE. This technical service bulletin provides repair instructions for the all-wheel drive coupling. |
| A3720992060148_1 | 2020-08-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION: OIL COOLER; POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:GEARS. This informational bulletin states to not replace parts for the beveling groove as it is normal. |
| A1720062028440_5 | 2020-08-06. 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_1 | 2020-07-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for identifying and mixing factory fill coolants. |
| A4020102044060_5 | 2020-07-07. Service bulletin. SUSPENSION. This technical service bulletin asks the reader to check for improperly installed or deformed front shock bellows and to replace if necessary. |
| Dealer 24FM | 2020-07-07. Service bulletin. FUEL SYSTEM, GASOLINE. Due to a software issue, the fuel injection system may encounter a 'vapor lock' condition. This condition could result in an EPC light, a poor running concern, and possibly a high-pitched noise from the engine compartment. |
| Circular 24FM | 2020-07-07. Service bulletin. FUEL SYSTEM, DIESEL. Due to a software issue, the fuel injection system may encounter a 'vapor lock' condition. This condition could result in an EPC light, a poor running concern, and possibly a high-pitched noise from the engine compartment. |
| A9120782057052_3 | 2020-07-07. 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. |
| A9020512058077_4 | 2020-07-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains instructions for determining unexpected Audi pre sense interventions. |
| A912076204250610 | 2020-07-07. 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_6 | 2020-07-07. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin contains instructions about updating the navigation map. |
| A0020382039206_3 | 2020-07-07. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This informational bulletin contains instructions on how to use the QR code in a TSB. |
| A9120702044694_2 | 2020-06-04. Service bulletin. EQUIPMENT. This technical service bulletin provides troubleshooting for issues with the navigation map database. |
| A9120652036576_6 | 2020-06-04. Service bulletin. EQUIPMENT. This informational bulletin contains instructions for when a phone is connected to the vehicle via Bluetooth, one of the following conditions occurs when the user searches for a contact name in the MMI address book (by using the MMI control knob or the voice recognition system): *The MMI screen goes blank then restarts. *The MMI screen freezes for a few minutes then recovers. |
| A6420742020552_9 | 2020-06-04. Service bulletin. VISIBILITY:WINDSHIELD; EQUIPMENT. This bulletin provides instructions on how to clean exterior glass. |
| A4220442038689_4 | 2020-06-04. 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 06 | 2020-06-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Apple car play function. |
| A4020062059474_1 | 2020-06-04. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; SUSPENSION. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end). |
| A0020372059437_1 | 2020-06-04. 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. |
| A872005201014615 | 2020-05-07. 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 25-2020 | 2020-05-07. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. This special notice is to inform dealers to return the parts listed if it meets the criteria provided. |
| A9020452059335_1 | 2020-05-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information on noises from the instrument cluster installation area. |
| A9020442032113_3 | 2020-05-07. Service bulletin. ELECTRICAL SYSTEM. This information bulletin contains a background on the outside air temperature reading. |
| A4220432059240_1 | 2020-05-07. Service bulletin. SUSPENSION:REAR:SHOCK ABSORBER. This bulletin contains repair instructions for knocking or rattling when driving on uneven roads. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.