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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
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.
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 This special notice is to inform dealers to return all parts listed and only use the superseded part numbers going forward.
A9020372058077_32020-02-08. Service bulletin. EQUIPMENT. This bulletin contains instructions for determining unexpected Audi pre sense interventions.
A9020362058077_22020-02-08. Service bulletin. SERVICE BRAKES; EQUIPMENT. This bulletin contains instructions for determining unexpected Audi pre sense interventions.
A0020332058030_22020-02-08. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin contains instructions for the Launch Process.
20TechReferncDoc2020-02-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Added SQ7, SQ8, & RS Q8 to titles & index
20AUUSMN1620202020-02-08. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Standard Maintenance Section: Connected Battery Box: ADDED: S7, Q7 45 TFSI, RS Q8 Additional Maintenance Items section: Fragrance Cartridges: ADDED: RS Q8 Rear axle, quattro® Sport - Change ATF and differential oil: ADDED: RS Q8 Spark plugs - Replace every 40,000 miles: ADDED: A6 allroad 55 TFSI S-Tronic transmission - Change fluid every 40,000 miles: ADDED: A6 allroad 55 TFSI OIL CAPACITY CHART: REMOVED: Q3 40 TFSI ADDED: A6 allroad 55 TFSI & RS Q8
A9119232037809_52020-01-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This informational bulletin contains instructions about updating the navigation map.
A9219242038151112020-01-08. Service bulletin. EQUIPMENT; VISIBILITY:WINDSHIELD WIPER/WASHER. This bulletin provides instructions for repairing a vehicle with a washer solvent light on but the level is correct.
A0019312058030_12020-01-08. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. This bulletin contains instructions for the Launch Process.
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.
SM 120-20192020-01-08. Service bulletin. EQUIPMENT. The part numbers listed in the document are to be returned if they meet the criteria provided.
A9419182012749_12020-01-08. Service bulletin. EXTERIOR LIGHTING; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Exterior lights, moisture accumulation 2013-2021 A3 Cabriolet, 2016-2018 Sportback, 2004-2005 A4 Cabriolet, 2004-2008 S4 Cabriolet, 2008 RS4 Cabriolet, 2010-2021 A4 allroad, 2018-2021 A5 Sportback, 2010-2012, 2018-2021 RS5 Cabriolet, 2018-2021 S5 Sportback, 2004-2006 A7, 2004-2011 S7, 2021 RS6 Avant, 2004-2006 S8
A9119182058007_12020-01-08. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This bulletin contains instructions for when there is no diagnostics communication with the ConBox.
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
A0019292031473_22020-01-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin contains instructions for when car wash bristles are stuck in the headlights. 2015-2021 A3 Cabriolet, 2015-2018 A3 e-tron, 2011-2021 A4 allroad, 2018-2021 A5 Sportback, 2011-2012 and 2018-2021 RS5 Cabriolet, 2018-2021 S5 Sportback, 2021 RS6 Avant
20AUTIRECHAINS2020-01-08. Service bulletin. EQUIPMENT; TIRES; EQUIPMENT ADAPTIVE/MOBILITY. New document 2004-2020 A4 allroad, A6 allroad, A8L, R8 Spyder
20A4S4ALRDCSDEL2020-01-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Updated Phone Box Form 2020 A4 allroad
SM 109-20192019-12-07. Service bulletin. EQUIPMENT. The part numbers listed in the document are to be returned and only the superseded part number going forward
20TechReferncDoc2019-12-06. Service bulletin. EQUIPMENT. "ADDED A6 allroad to titles throughout document "
20A4S4ALRDTECREP2019-11-06. Service bulletin. EQUIPMENT. Vehicle Preparation Section: Changed Phone Box verbiage. Added Install Front license plate carrier (if necessary)*

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