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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.

By type

By component

By trouble code

By topic

Bulletins, newest first
A9020442032113_32020-05-07. Service bulletin. ELECTRICAL SYSTEM. This information bulletin contains a background on the outside air temperature reading.
20A4TECHREP4202020-05-07. Service bulletin. ELECTRICAL SYSTEM. Audi connect Section: Moved to end of document. Post-Road Test Section: ADDED Steps: - Verify SOS button is green and Roadside assistance button LED will remain off - It may take up to 20 minutes for the emergency call system to activate (LED turns green) after flight/transport mode deactivation - The vehicle must not be delivered to the customer if the emergency call function has not been successfully activated (LED lights up in green)
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.
A6420722047061_22020-05-07. Service bulletin. STRUCTURE. This bulletin contains a cleaning procedure from leftover residue from suction cups or labels.
A4320322051336_22020-05-07. Service bulletin. SUSPENSION. This bulletin contains repair instructions for DTC B200FF0.
A5120132009967_12020-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for vehicle inspection, protection removal, and detailing.
A3920282059057_12020-04-02. Service bulletin. UNKNOWN OR OTHER. This bulletin contains repair instructions for noises when in reverse or vibrations/humming/droning or rubbing whrn fully turning the wheel.
A3420472058875_12020-04-02. Service bulletin. UNKNOWN OR OTHER. This bulletin contains instructions for oil leaking from the vehicle without a DTC.
A0120512057831_22020-04-02. Service bulletin. UNKNOWN OR OTHER. This bulletin contains repair instructions for DTC P201500 which may or may not have a MIL on.
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
A9420202017806132020-04-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information regarding when the message 'Vehicle lights: malfunction' appears with DTC 03280, 01800, or B126AF0.
A3420462058928_12020-04-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL). This bulletin contains instructions for recalibrating the gear sensor when the 'P' displays begin to flicker on the selector display and in the instrument cluster display.
A0120482058767_12020-04-02. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400.
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
20TIREPRSCHRT032020-04-02. Service bulletin. TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. Added tire pressures for SQ7, SQ8, & RS Q8
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.
A5720652058452_12020-03-05. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW. This bulletin contains repair instructions for when the rear window defog button will light up and then turn off.
A4420732056386_32020-03-05. Service bulletin. STEERING: STEERING WHEEL/HANDLE BAR. This bulletin contains instructions for when the vehicle pulls to one side or the steering wheel is crooked.
20AUUSMaint02202020-03-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Standard Maintenance Section: Connected Battery Box: ADDED: SQ7, SQ8 Additional Maintenance Items section: Fragrance Cartridges: ADDED: SQ7, SQ8 Rear axle, quattro® Sport - Change ATF and differential oil: ADDED: SQ7, SQ8 Spark plugs - Replace every 30,000 miles: ADDED: SQ7, SQ8 OIL CAPACITY CHART: ADDED: SQ7, SQ8 CHANGED: Castrol Oil to 'Audi High Performance Genuine Engine Oil'
A9120352058096_22020-03-05. Service bulletin. EQUIPMENT. This bulletin contains instructions for a full factory reset when Audi connect services are not functioning properly.
A9120342042506_92020-03-05. Service bulletin. EQUIPMENT. 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.
20AUUSMaint01302020-02-08. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Standard Maintenance Items section: ADDED to Connected box battery '(for Audi Connected Services)'
SM 01-20202020-02-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This special notice is to inform dealers to return all parts listed and only use the superseded part numbers going forward.

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