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Service bulletins for the 2019 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.

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

By type

By component

By trouble code

Only bulletins with component: Glass, wipers and mirrors are shown. Show all

Bulletins, newest first
A8723372055257_62023-02-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides directions when the customer describes a problem with the HVAC system DTCs B11AF07 and/or B109207 could be logged as sporadic or static.
A8023122062583_22023-02-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides instructions for when the customer advises that there is insufficient or uneven cabin heating from the HVAC system.
A6023612063187_22023-02-07. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. This bulletin provides instructions for when a customer reports concerns with the sunroof opening permeter seal is generating noise, dripping water, or if the seal is distorted and/or not flush with the roof panel.
A9222302038151122022-08-04. Service bulletin. VISIBILITY:REAR WINDOW WIPER/WASHER. This bulletin provides instructions for repairing a vehicle with a washer solvent light on but the level is correct.
A6422852020552112022-08-04. Service bulletin. VISIBILITY; EQUIPMENT. This bulletin provides instructions on how to properly clean exterior glass.
A9222312067557_12022-08-04. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. This bulletin advises that the window washer pump may become blocked due to frozen washer fluid; one more more DTCs may be present: DTCs B126101, B126111, or B126113.
A8722272041717_82022-06-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This informational bulletin details on how to get a GFF test plan for A/C compressor replacements.
A8722252010146172022-05-05. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin contains instructions for properly cleaning and removing a musty odor from the heating and ventilation system.
A6421812049956_22022-01-06. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. This bulletin contains a software update to address one or more various malfunctions of the motor for the window regulator with DTCs; B148713, B14874B , B148754 and/or B148701.
A5721862058452_32021-12-07. 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.
A6421802020552_12021-06-03. Service bulletin. VISIBILITY:GLASS, SIDE/REAR. This bulletin provides instructions on how to clean exterior glass.
A5721742058452_22021-03-04. Service bulletin. VISIBILITY. This bulletin contains repair instructions for when the rear window defog button will light up and then turn off.
A6420742020552_92020-06-04. Service bulletin. VISIBILITY:WINDSHIELD; EQUIPMENT. This bulletin provides instructions on how to clean exterior glass.
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.
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.
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

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