Audi bulletin 91X4
What it saysThe infotainment system privacy setting “Allow data transmission” may, in unfavorable circumstances, change without user intervention. NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Feb 5, 2026, received Mar 3, 2026 — 1 document under this number: Bulletin 91X4 20260205. It names 12 model years (2019–2020). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThe infotainment system privacy setting “Allow data transmission” may, in unfavorable circumstances, change without user intervention. As a result, the vehicle sends data although this function was previously deactivated manually. The campaign code was reactivated for affected vehicles that are also included in Compliance Recall 90TV. THIS UPDATE MUST BE COMPLETED BEFORE PERFORMING COMPLIANCE RECALL 90TV.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Bulletin 91X4 20260205 | Service bulletin | Feb 5, 2026 | 11029361 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 12 model years this bulletin names have filed 538 complaints with NHTSA since 2015.
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Audi, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Audi 91X4 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 91X4 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 91X4 cover?
The manufacturer filed it against 12 model years: 2020 Audi A6, 2019 Audi A6, 2020 Audi A7, 2019 Audi A7, 2020 Audi A8, 2019 Audi A8 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.