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Service bulletins for the 2018 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.

772 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
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.
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.
A9019352058077_12020-01-08. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin contains instructions for determining unexpected Audi pre sense interventions.
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.
Dealer 23Ai2020-01-08. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This action addresses an emissions system-related Engine-Off calculation error and improves the Oxygen Sensor Aging-Correction Factor. Neither concern has a direct impact to vehicle exhaust or evaporative emissions. However, either condition could affect proper operation of the Malfunction Indicator Lamp (MIL). 2017-2018 A3 Cabriolet
Circular 23Ai2020-01-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This action addresses an emissions system-related Engine-Off calculation error and improves the Oxygen Sensor Aging-Correction Factor. Neither concern has a direct impact to vehicle exhaust or evaporative emissions. However, either condition could affect proper operation of the Malfunction Indicator Lamp (MIL). 2017-2018 A3 Cabriolet
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
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.
A8719022055257_42020-01-08. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:APPLIANCE:AIR CONDITIONER. This bulletin contains repair instructions for when the HVAC system is having issues with air flow and temperature commands with DTCs B11AF07 and B109207. 2017-2019 A4 allroad, 2018-2019 A5 Sportback
A8719012055257_32020-01-08. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin contains repair instructions for when the HVAC system is having issues with air flow and temperature commands with DTCs B11AF07 and B109207. 2017-2019 A4 allroad, 2018-2019 A5 Sportback
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
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
A7019692044503_32019-12-07. Service bulletin. EQUIPMENT. This bulletin provides instructions to insulate the rear parcel shelf or rear subwoofer grille with foam strips to eliminate a rattle noise.
A9219232038151_12019-12-07. Service bulletin. VISIBILITY; VISIBILITY:WINDSHIELD WIPER/WASHER. This bulletin provides instructions for repairing a vehicle with a washer solvent light on but the level is correct. 2015-2021 A3 Cabriolet, 2016-2018 A3 Sportback, 2018-2021 A5 Sportback, 2012 and 2018-2021 RS5 Cabriolet, 2018-2021 S5 Sportback, 2021 RS 6 Avant
A4419712022563_12019-12-06. Service bulletin. WHEELS. This bulletin provides information regarding vibrations or movement that are felt in the wheel. 2015-2020 A3 Cabriolet, 2016-2018 A3 Sportback, 2008-2009 S4 Cabriolet, 2008 and 2010 RS4 Cabriolet, 2018-2020 A5 Sportback, 2010-2012 and 2018-2020 RS5 Cabriolet, 2018-2020 S5 Sportback, 2008 A7, 2008-2011 S7
A9119082057052_12019-11-07. Service bulletin. UNKNOWN OR OTHER. This bulletin contains instructions for when the MMI shows the message 'Read error occurred when accessing the navigation data' after initialization and reboots constantly.
A9119062042506_72019-11-07. Service bulletin. UNKNOWN OR OTHER. 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 99-20192019-11-07. Service bulletin. UNKNOWN OR OTHER. The part number listed in the document are to be returned if they meet the criteria provided.

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