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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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Bulletins, newest first
A011861 2050690_2018-05-21. Service bulletin. EQUIPMENT; ENGINE. This bulletin contains a software update for when the "Reduce Oil Level" message appears and the oil level is not over max specifications.
A011860 2048604_2018-05-21. Service bulletin. ENGINE. This bulletin contains a software update for a MIL on with DTC P008700.
A011859 2050690_2018-05-21. Service bulletin. EQUIPMENT; ENGINE. This bulletin contains a software update for when the "Reduce Oil Level" message appears and the oil level is not over max specifications.
2018 Audi Tire C2018-05-21. Service bulletin. TIRES. New Document Added
MY 2018 Audi Tec2018-04-16. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Technician Reference Document Overview The Pre-Delivery Inspection Technician Reference Document is designed to be a resource used in hand with the Pre-Delivery Inspection Checklist (PDI). The PDI Checklist has been simplified to make the process more efficient, and in doing so, this document has been created to be used as a reference for checklist items that may have additional information. On the PDI Checklist, you find that certain items have been notated with an asterisk symbol (*), this lets you know that additional information can be found in this Technician Reference Document.
Scheduled Mainte2018-04-16. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Additional Maintenance Section: Added, "(if applicable)" to Battery - Connected gateway - Replace
Scheduled Mainte2018-04-16. Service bulletin. ELECTRICAL SYSTEM. Additional Maintenance Section: CHANGED: "RS 7 Plus" to "RS 7 performance" on Rear Axle every 40,000 miles and Spark plugs - Replace every 30,000 miles or 3 years ADDED: "(except RS 7 performance)" and "(except S8 plus)" to Spark Plugs - Replace every 40,000 miles or 6 years
PDI 2018 Audi Te2018-04-16. Service bulletin. EQUIPMENT:ELECTRICAL. Audi A3 e-tron Sportback: Audi connect section: ADDED "Turn on the wireless network (if equipped) Ensure the wireless network is turned on (Telephone > Options > Wi-Fi® options > Wi-Fi® Mode ?Hotspot?) " Audi A3/S3/RS 3: ADDED: Verify system connects to mobile network (if equipped) Review TSB 2042942 for additional information Make sure the system fully connects to the wireless network (LTE symbol with service bars)(only applies if in an AT&T service area)
PDI 2018 Audi Te2018-04-16. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. All models: Vehicle Preparation section: ADDED "Using Guided Functions" to "Set adaption channel to enable CD Ripping (if equipped)" A8 and Q3: Audi connection: REMOVED: "Turn on the wireless network (if equipped)"
PDI 2018 A4-S4-a2018-04-16. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Reminders Section: REMOVED: "It is advised to start ODIS with the engine running to enable all 5F Test Plans in GFF and also to ensure SVM sees all control units during the SVM check vehicle configuration" Vehicle Preparation section: ADDED "Using Guided Functions" to "Set adaption channel to enable CD Ripping (if equipped)"
A911755 20484362018-04-16. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin contains repair instructions for when after PDI is performed, the customer states that the Audi connect services are not functioning.
MY 2018 Audi USA2018-04-16. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:SUN/MOON ROOF ASSEMBLY; SUSPENSION. Under Additional Maintenance Items Section: Removed e-tron from "Perform every 130,000 miles. Timing belt - Replace. Check condition of timing belt tensioning system, dampening pulleys, and idler pulleys and replace if necessary (2.0L TDI models only)" Under Standard Maintenance Section: Removed A5/S5 Cabriolet from "Rollover protection: Check function with soft top down (A3 Cabriolet and R8 Spyder only)" Under Standard Maintenance Section: Removed Q7 from "Panorama sunroof systems - Check function (if equipped) (all except A8L)" and "Panorama sunroof systems - Clean guide rails and lubricate with grease (if equipped) (A8L only)"
A461884 2050535_2018-04-16. Service bulletin. SERVICE BRAKES, AIR:DISC:CALIPER. This informational only bulletin indicates that rear calipers missing the "S" badge are to not to be retrofitted to the old style.
Scheduled Mainte2018-04-16. Service bulletin. ENGINE AND ENGINE COOLING. Oil Capacity Table: For A3 B-Cycle 2.0 TFSI engine: Changed oil spec from 508/509** Castrol EDGE® Professional® 5W40 to 508/509** Castrol EDGE® Professional® 0W20 Long Life IV
A911768 2037809-2018-04-16. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This informational bulletin contains instructions about updating the navigation map.
MY 2018 PDI 3-8-2018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Reminders: ADDED "For items marked with **, follow instructions for stock inventory vehicle" Under the hood inspection: REMOVED Lighting and Windshield: REMOVED "Install wiper blades" Trunk Inspection: Change "Verify inflatable repair kit" to "Verify inflatable spare tire" Moved "Check battery clamps for proper torque" from Under the hood inspection Interior: Added ventilated "Verify operation of heated seats/ventilated (if equipped) Settings: ADDED: "?Set Time source setting to ?GPS? and set Auto daylight savings time to ?on? CHANGED: Set ?Entertain. Fad.? in Parking aid to an audible level from "Medium". ADDED: Set ?Music volume while parking? to 6 lines ADDED (if equipped) to "Turn off Manual Speed Warning" Audi connect: ADDED: "Check LTE connection is possible (if vehicle is marked retail sold in DMS, data is only available after customer starts 6-month trial in www.myaudiconnect.com)" REMOVED: "?Verify system connects to mobile network (if equipped). Review TSB 2042942 for additional information" REMOVED: "No data available at PDI" from ?"Check Wi-Fi hotspot visibility"On-Hoist Inspection REMOVED: Perform a coolant reservoir cap pressure test Driving Performance: ADDED: "Verify engine Start-Stop System functionality" Post-Road Test Inspection: CHANGED: "Interrogate fault memory and print Diagnostic Log" to "Interrogate fault memory and upload Diagnostic Log to GFF Paperless Server" MOVED: "Check Service Interval and verify correct interval is displayed", "Check engine oil level", "Check all fluid levels and top off if necessary", and "Perform a battery test" from Under the Hood section ADDED: "**" to the end of "Apply Inventory Maintenance Sticker**" "?Install showroom charger to ensure battery remains charged at all times**"
A911691 2042506-2018-03-13. 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 .
A871679 2041717-2018-03-13. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER. This bulletin applies to any repair that requires replacement of the air conditioning compressor and details how to run a ODIS GFF test plan.
A1915612025303-52018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 14-50 dated June 20, 2014. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service.
A171782 2010043-2018-02-05. Service bulletin. ENGINE. This informational bulletin contains all the the Audi Oil Quality Standards that should be used when doing an oil change.
A441764 2022563-2018-02-05. Service bulletin. SUSPENSION:FRONT. This bulletin provides information regarding vibrations or movement that are felt in the wheel.
MY 2018 Audi A4-2018-02-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This document contains the revised checklist for the Audi Technician Reference Document. Please see PDF change file for details.
MY 2018 Audi A4-2018-02-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Settings: REMOVED: "Load On-Board Tutorials"
MY 2018 A4-S4-A42018-02-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Settings: REMOVED: "Load On-Board Tutorials"
MY 2018 A4-S4-al2018-02-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Owner's Documents: REMOVED: "Explain the ?text to phone? features for viewing tutorials on a smartphone or at the Audi Technology website: www.auditechnology.com" Infotainment Section: REMOVED: "Explain and configure preset hard keys"

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