TSB 90X4 — Audi Service campaign
90X4 is a service campaign on file with NHTSA for 3 Audi models, 2024 model years, filed and re-filed as 6 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. The gateway control module will be replaced at no cost to owners. Updated claiming information
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. 90X4 is filed as a service campaign, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years 90X4 names
Every document filed under 90X4
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| Circular 90X4_REV1 | August 22, 2024 | Service campaign |
| Dealer 90X4_REV1 | August 22, 2024 | Service campaign |
| Circular 90X4_REV1 | August 22, 2024 | Service campaign |
| Dealer 90X4_REV1 | August 22, 2024 | Service campaign |
| Circular 90X4 | May 21, 2024 | Service campaign |
| Circular 90X4 | May 21, 2024 | Service campaign |
Questions buyers ask
What is TSB 90X4?
90X4 is a service campaign filed with NHTSA by Audi, covering 3 Audi models across the 2024 model years. NHTSA's summary reads: The gateway control module will be replaced at no cost to owners. Updated claiming information
Which vehicles does 90X4 cover?
NHTSA's file names Audi A4 (2024); Audi Q5 (2024); Audi Q7 (2024). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 90X4 a recall, and is the repair free?
90X4 is filed as a service campaign, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.
How do I get the full text of 90X4?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 90X4, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 90X4. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.