Audi service campaign 91FN
Audi filed this with NHTSA as a service campaign dated May 22, 2026, received Sep 6, 2024, about the unknown or other — 6 documents under this number: Dealer 91FN_20260522, Circ_91FN_20260522, Dealer 91FN_REV2, Circular 91FN_REV2. It names 4 model years (2022–2023). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communication91FN Dealer Communication - Revision. Affected vehicles will receive the latest software version via a software update. This software contains an optimized self-diagnosis function for the high-voltage battery. In addition to the software update, the high-voltage battery cells may experience an increased self-discharge. The high-voltage battery will be evaluated, and any affected high-voltage cell modules will be replaced. Updated labor operations.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Dealer 91FN_20260522 | Service campaign | May 22, 2026 | 11033461 | not yet checked |
| Circ_91FN_20260522 | Service campaign | May 22, 2026 | 11033459 | not yet checked |
| Dealer 91FN_REV2 | Service campaign | Aug 14, 2024 | 11007372 | not yet checked |
| Circular 91FN_REV2 | Service campaign | Aug 14, 2024 | 11007369 | not yet checked |
| Dealer 91FN_REV2 | Service campaign | Aug 14, 2024 | 11007291 | not yet checked |
| Circular 91FN_REV2 | Service campaign | Aug 14, 2024 | 11007288 | not yet checked |
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 themAlso filed against model years this site has no page for: 2022 Audi Q4 Sportback E-Tron; 2023 Audi Q4 Sportback E-Tron.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Audi 91FN a recall?
No. A service campaign 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 91FN repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does 91FN cover?
The manufacturer filed it against 4 model years: 2023 Audi Q4 e-tron, 2022 Audi Q4 e-tron, 2022 Audi Q4 Sportback E-Tron, 2023 Audi Q4 Sportback E-Tron. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.