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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

Only bulletins with type: Other are shown. Show all

Bulletins, newest first
DC_Audi_CF_ Airbag2026-04-07. Other. AIR BAGS. The National Highway Traffic Safety Administration (NHTSA) has issued an urgent warning regarding counterfeit replacement airbag inflators that are being installed in used vehicles.
SM 63-20252025-12-05. Other. ENGINE. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.
SM 26-20252025-05-03. Other. STEERING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
SM 15-20252025-04-04. Other. LANE DEPARTURE: WARNING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
CampTip_RNA_Audi2024-11-06. Other. UNKNOWN OR OTHER. Vehicle Concerns Before Recall Repair Available
AVIN4APIN202408052024-09-06. Other. UNKNOWN OR OTHER. Summary of all Audi Vin4Pin topics in June Quatro Ultra vibrations MIB3 - Stuck on loading user information when booting up Airbag light on, DTCs B101704, B103604 Q5 Airbag light Roof panel buttons inop Airbag light B12251B front windows is noisy and/or binding Front door wind noise
AVIN4APIN202408052024-09-06. Other. UNKNOWN OR OTHER. Summary of all Audi Vin4Pin topics in June Quatro Ultra vibrations MIB3 - Stuck on loading user information when booting up Airbag light on, DTCs B101704, B103604 Q5 Airbag light Roof panel buttons inop Airbag light B12251B front windows is noisy and/or binding Front door wind noise
SM 42-20242024-08-06. Other. STEERING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
SM 41-20242024-08-06. Other. ELECTRICAL SYSTEM. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
SM 40-20242024-08-06. Other. ELECTRICAL SYSTEM. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
SM 39-20242024-08-06. Other. ENGINE. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
DC_Q5 Hybrid2024-07-02. Other. UNKNOWN OR OTHER. This document provides clarity on the MY24 Audi Q5 Hybrid fault code with technical service bulletin release on Monday, June 24.
DC_Q5 Hybrid2024-07-02. Other. UNKNOWN OR OTHER. This document provides clarity on the MY24 Audi Q5 Hybrid fault code with technical service bulletin release on Monday, June 24.

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