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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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By component

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
A4320372059665_12020-07-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; SUSPENSION. This bulletin contains a software update that corrects the control module configuration and addresses a warning light.
A0020382039206_32020-07-07. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This informational bulletin contains instructions on how to use the QR code in a TSB.
A9120672059528_12020-06-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains ODIS instructions for DTC B200096 or B200000 with an SOS malfunction warning displayed in the instrument cluster.
TT 91 18 062020-06-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Apple car play function.
A9020452059335_12020-05-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information on noises from the instrument cluster installation area.
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)
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.
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'
20AUUSMaint01302020-02-08. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Standard Maintenance Items section: ADDED to Connected box battery '(for Audi Connected Services)'
20A4TECHREP12192020-01-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. "Vehicle Preparation Section: ADDED additional steps to Perform TSB 2058096/1 "91 Audi connect has no function, SOS LED is off, and SOS warning message in FPK"": - Perform MMI Menu Reset: 5F-Information Electronics >> Guided Functions >> Basic Settings >> Reset MMI Menu Settings - Deactivate privacy mode: Main Menu >> Privacy >> Activate Privacy Settings (Turn off) - Turn Vehicle Off and allow Bus Sleep Cycle "
A9119232037809_52020-01-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This informational bulletin contains instructions about updating the navigation map.
A9119212058096_12020-01-08. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin contains instructions for a full factory reset when Audi connect services are not functioning properly.
20A4S4ALRDTECREP2020-01-08. Service bulletin. ELECTRICAL SYSTEM. Vehicle Preparation Section: ADDED: "Perform TSB 2058096/1 '91 Audi connect has no function, SOS LED is off, and SOS warning message in FPK'" 2020 A4 allroad
A9119162042506_82020-01-08. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. 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.
A9119152056076_52020-01-08. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM. This bulletin contains instructions for when there is no diagnostics communication with the ConBox.
A0119342057831_12020-01-08. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains repair instructions for DTC P201500 which may or may not have a MIL on. 2018-2019 A4 allroad, 2018-2020 A5 Sportback
A9119112056076_42019-12-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains instructions for when there is no diagnostics communication with the ConBox.
A0019252011732_12019-10-21. Service bulletin. ELECTRICAL SYSTEM. 00 Software Version Management (SVM), operating instructions
A9119932037087_42019-10-15. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains instructions for enabling text message notifications through the MMI system.
A9419132017806_12019-10-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information regarding when the message 'Vehicle lights: malfunction' appears with DTC 03280, 01800, or B126AF0.
A9119952056076_32019-10-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. This bulletin contains instructions for when there is no diagnostics communication with the ConBox.
A9119942055945_22019-10-07. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE. This bulletin contains repair instructions for when the warning message 'SOS Emergency call function deactivated' is seen in the instrument cluster.
A9119792055945_12019-09-09. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin contains repair instructions for when the warning message 'Emergency call function deactivated' is seen in the instrument cluster.

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