Service bulletins for the 2018 Audi A4
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.
772 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| A4320372059665_1 | 2020-07-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; SUSPENSION. This bulletin contains a software update that corrects the control module configuration and addresses a warning light. |
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| 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. |
| SM 32-2020 | 2020-06-04. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the part number listed if it meets the criteria provided. |
| A9120662044130_7 | 2020-06-04. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin explains to the reader that a solution is being developed for an issue with the MMI screen going blank when an iPhone is connected, and that the vehicle VIN should be submitted for notification when the solution is ready. |
| A9020482048517_3 | 2020-06-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin contains a software update for when only the park aid lines are displayed. |
| A6920522059428_1 | 2020-06-04. Service bulletin. SEAT BELTS; AIR BAGS. This bulletin contains instructions for DTCs B130494 and B130594. |
| A6420742020552_9 | 2020-06-04. Service bulletin. VISIBILITY:WINDSHIELD; EQUIPMENT. This bulletin provides instructions on how to clean exterior glass. |
| A4020072047920_4 | 2020-06-04. Service bulletin. STEERING; SUSPENSION; EQUIPMENT:MECHANICAL. The bulletin contains diagnosis information for noises on the front end of the vehicle. Potential rolling sounds. |
| 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). |
| A4020052024318_9 | 2020-06-04. Service bulletin. EQUIPMENT; WHEELS. This technical service bulletin provides instructions for correcting a clicking sound from the wheel bearing(s). |
| A4020042047920_3 | 2020-06-04. Service bulletin. SUSPENSION. The bulletin contains diagnosis information for noises on the front end of the vehicle. Potential rolling sounds. |
| A1020182059446_1 | 2020-06-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains repair instructions for oil loss found in the engine compartment. |
| A6420732046397_4 | 2020-06-04. Service bulletin. VISIBILITY. This bulletin provides repair information for a creaking in the front and rear windshield. |
| 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. |
| A1520342053278_3 | 2020-05-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains repair instructions for 3.0 and 2.9 TFSI engines that have oil loss around the engine compartment, front end, and underbody. |
| 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. |
| A9120602054812_3 | 2020-05-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains repair instructions for when a yellow SOS lamp appears with DTC B105313 and B153313. |
| 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. |
| A9120572055591_1 | 2020-05-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin contains a software update for when the MMI screens go blank and the system reboots, it may have stored DTC U10CF00 and/or B13B901. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.