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Service bulletins for the 2018 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.

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

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By component

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Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
A6420742020552_92020-06-04. Service bulletin. VISIBILITY:WINDSHIELD; EQUIPMENT. This bulletin provides instructions on how to clean exterior glass.
A0120632058767_42020-06-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400.
A4220442038689_42020-06-04. Service bulletin. EQUIPMENT; SUSPENSION. This bulletin contains information on how to fix a clunking or rattling noise heard from the rear suspension when the vehicle is driven over bumps.
TT 91 18 062020-06-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Apple car play function.
A4020062059474_12020-06-04. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; SUSPENSION. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end).
A4020052024318_92020-06-04. Service bulletin. EQUIPMENT; WHEELS. This technical service bulletin provides instructions for correcting a clicking sound from the wheel bearing(s).
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.
A9120392018187112020-03-05. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This bulletin contains inspection guidelines for radio interference that causes noises in the speaker.
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.
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.
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.
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
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
ATUBody20192019-10-07. Service bulletin. EQUIPMENT. Body components - Examples of customer misuse
A0019262052680_22019-10-02. Service bulletin. EQUIPMENT. This bulletin contains instructions for additional reporting requirements for safety related inquiries (airbag/seatbelts, accidents, fire and overheat damage.
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
A151933 2053278-2019-04-15. Service bulletin. ENGINE; EQUIPMENT. This bulletin contains repair instructions for 3.0 and 2.9 TFSI engines that have oil loss around the engine compartment, front end, and underbody.
2018 Audi 2019012019-04-08. Service bulletin. ENGINE; EQUIPMENT. Oil Capacity Table: Changed Oil Specs for all models
A481977 2053869-2019-04-01. Service bulletin. STEERING; EQUIPMENT. This bulletin contains repair instructions for when DTC B145504 with symptom code 7340800.
2018 Audi 2019012019-04-01. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. Oil Capacity Table: Changed Oil Specs for all models
Audi MY 2018 2012019-04-01. Service bulletin. TIRES; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. ADDED to footnote (b at the end of the chart: "If vehicle has a top speed of 174 mph, it has the Dynamic Plus Package which can be identified by PR Code PAB" - A3 2.0L, S3 2.0L, RS 3 2.5L, A3 Cabriolet 2.0L, A3 e-tron Sportback 1.4L, A4 2.0L (190 hp), A4 2.0L (252 hp), S4 3.0L, A4 allroad 2.0L, A5 Cabriolet 2.0L, S5 Cabriolet 3.0L, A5 Coupe 2.0L, S5 Coupe 3.0L, A5 Sportback 2.0L, S5 Sportback 3.0L, RS 5 2.9L, A6 2.0L, A6 3.0L, S6 4.0L, A7 3.0L, S7 4.0L, RS7 4.0L (560 hp), RS7 4.0L (performance 605 hp), A8 3.0L, A8L 3.0L, A8 4.0L, A8L 4.0L, S8 4.0L, S8 Plus 4.0L, Q3 2.0L, Q5 2.0L, SQ5 3.0L, Q7 2.0L, Q7 3.0L, SQ7 4.0L, R8 Coupe 5.2L, R8 Spyder 5.2L (540hp), R8 Spyder 5.2L (610hp), TT 2.0L, TTS 2.0L, TTRS 2.5L.
A921916 20381512019-04-01. Service bulletin. EQUIPMENT; VISIBILITY:REAR WINDOW WIPER/WASHER. This bulletin provides instructions for repairing a vehicle with a washer solvent light on but the level is correct.

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