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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.

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

Bulletins, newest first
A4020132059474_22020-08-06. Service bulletin. SUSPENSION:FRONT:SHOCK ABSORBER; EQUIPMENT. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end).
A3920342060169_12020-08-06. Service bulletin. EQUIPMENT; POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT. This bulletin contains instructions for when DTC U101300 is logged with sports differential warning lamps or messages.
A9120782057052_32020-07-07. 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_12020-07-07. 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.
A9120722037809_62020-07-07. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin contains instructions about updating the navigation map.
A9120712059647_12020-07-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This bulletin contains a software update that corrects post-Audi connect activation error messages.
A0020382039206_32020-07-07. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This informational bulletin contains instructions on how to use the QR code in a TSB.
A9120702044694_22020-06-04. Service bulletin. EQUIPMENT. This technical service bulletin provides troubleshooting for issues with the navigation map database.
A9120652036576_62020-06-04. 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 32-20202020-06-04. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the part number listed if it meets the criteria provided.
A6420742020552_92020-06-04. Service bulletin. VISIBILITY:WINDSHIELD; EQUIPMENT. This bulletin provides instructions on how to clean exterior glass.
A4020072047920_42020-06-04. Service bulletin. STEERING; SUSPENSION; EQUIPMENT:MECHANICAL. The bulletin contains diagnosis information for noises on the front end of the vehicle. Potential rolling sounds.
A4220442038689_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).
A4020052024318_92020-06-04. Service bulletin. EQUIPMENT; WHEELS. This technical service bulletin provides instructions for correcting a clicking sound from the wheel bearing(s).
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.
A6920502059223_12020-05-07. Service bulletin. EQUIPMENT. This bulletin contains information regarding the replacement of PODs components.
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.
A5120132009967_12020-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for vehicle inspection, protection removal, and detailing.
20A4TECHREP3202020-04-02. 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
SM 14-20202020-04-02. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed and order the superseded part number going forward
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.

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