Service bulletins for the 2020 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.
1073 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| 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. |
| A9020542059891_1 | 2020-07-07. Service bulletin. ELECTRICAL SYSTEM:IGNITION. This informational bulletin directs you to read the SSP and not perform any repairs for the concern. |
| 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. |
| A9020522059863_1 | 2020-07-07. Service bulletin. EQUIPMENT. This informational bulletin contains instructions for when the message "Audi pre sense currently restricted. See owners manual" is displayed in the instrument cluster without DTCs. |
| A9020512058077_4 | 2020-07-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains instructions for determining unexpected Audi pre sense interventions. |
| A9120722037809_6 | 2020-07-07. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin contains instructions about updating the navigation map. |
| A9120712059647_1 | 2020-07-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This bulletin contains a software update that corrects post-Audi connect activation error messages. |
| 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. |
| 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. |
| A9120672059528_1 | 2020-06-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains ODIS instructions for DTC B200096 or B200000 with an SOS malfunction warning displayed in the instrument cluster. |
| 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. |
| 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.