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Service bulletins for the 2019 Audi S4

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.

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

By type

By component

By trouble code

Only bulletins with component: Labels and manuals are shown. Show all

Bulletins, newest first
A1921262061918_42022-01-05. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides guidance on diagnosing a coolant light concern with normal coolant level in the tank.
DC 202109282021-10-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Dealer Communication - Vehicle Sales Reporting, Reinstatement, and Audit Policy Update - Effective September 30, 2021
A9621712051239_22021-08-04. Service bulletin. STRUCTURE:BODY:DOOR; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contain instructions for addressing issues with the garage door remote and HomeLink.
A1921192061918_32021-07-02. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides guidance on diagnosing a coolant light concern with normal coolant level in the tank.
A0021482021205_62021-07-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; STRUCTURE. This informational bulletin explains how to order replacement VIN plates, Safety Certification Labels, etc.
A0021472031473_32021-07-02. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS:CONCEALMENT DEVICES; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; STRUCTURE. This information bulletin states to remove the car wash bristle and advise the customer to go somewhere else to prevent it from occurring again.
A9421392063739_12021-07-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EXTERIOR LIGHTING:HEADLIGHTS:DAYTIME RUNNING LIGHTS:BULBS. This information bulletin explains how the daylights turn on and off.
A4821022061904_32021-07-02. Service bulletin. STEERING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. This bulletin contains repair instruction for when DTC C110DF0 is stored and the yellow steering lamp is on.
A4321472051336_42021-07-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains repair instructions for DTC B200FF0.
A9121042024323_82021-06-03. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SOFTWARE. This bulletin contains technical information regarding when the parking aid sporadically warns of obstacles that don't exist or it is inoperative/constant warning.
TechRef20192021-05-10. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 2019 Tech Reference
AudiTechRef20192021-05-10. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Pre-Delivery Inspection Technician Reference Document
A6421792047061_32021-05-06. Service bulletin. EQUIPMENT:OTHER:LABELS. This bulletin contains a cleaning procedure from leftover residue from suction cups or labels.
A9121702062267_12021-03-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin states to not perform any repairs and show the customer how to manually re-enable the map.
A4620192061331_12020-12-04. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for addressing an ABS warning light with DTCs C050200 and/or C050800.
A4620182061403_12020-12-04. Service bulletin. SERVICE BRAKES, AIR:DISC:PADS; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for addressing a brake pad wear indicator light with no DTCs.
2010-2021EngOil2020-09-03. Service bulletin. ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. New document
A0120632058767_42020-06-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400.
A1020182059446_12020-06-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains repair instructions for oil loss found in the engine compartment.
A5120132009967_12020-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for vehicle inspection, protection removal, and detailing.
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
A9119762051720_32019-09-16. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for submitting a customer registration form for the Audi phone box to the customer's Mobile Network Operator.
A6019322055443_12019-08-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin contains instructions for claiming Panoramic sunroofs. 2017-2022 A3, A3 Cabriolet, S3, A4, S4, A4 allroad, A5, A5 Cabriolet, S5, S5 Cabriolet, A5 Sportback, S5 Sportback, RS5, A6, S6, RS6, Q3, Q5, SQ5, Q7, and Audi e-tron quattro, 2017-2018 A3 e-tron, A7, A8, S7, S8, and RS8. 2019-2022 Q8
19TechReferncDoc2019-05-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. A4: Lighting and Windshield Section: REMOVED A5: Lighting and Windshield Section: CHANGED: "Test front washers (and headlight washers if equipped - RS 5 only)" A6: On-Hoist Inspection Section: ADDED: "Remove locking elements on front axle suspension struts (For vehicles with sport suspension 1BE) Push all five locking elements on each suspension strut off piston rod. Refer to Elsa for full procedure" A7: On-Hoist Inspection Section: ADDED: "Remove locking elements on front axle suspension struts (For vehicles with sport suspension 1BE) Push all five locking elements on each suspension strut off piston rod. Refer to Elsa for full procedure" Q5: Lighting and Windshield Section: REMOVED Interior Section: ADDED: "(if equipped)" to "Check panoramic sunroof and sunshade operation" This document also applies to 2019 A8L and 2019 TTRS
2019-201902182019-04-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. e-tron Settings: Added: "Home > Settings > General > Measurement Units > Consumption (electric motor) to mi/kWh, and check to ensure all other units are set to US specs"

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