Audi bulletin AOS-24-56
What it saysThe hotfix is for a 2023 Q4 eTron The hot fix is for testers using ODIS version 24.1.1 and 2.35.1 This hotfix is for the missing Function Enabling System (FES) test plan which is used for SWAP (=software as product)… NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Aug 22, 2024, received Sep 6, 2024, about the engine — 2 documents under this number. It names 1 model year (2023). 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 hotfix is for a 2023 Q4 eTron The hot fix is for testers using ODIS version 24.1.1 and 2.35.1 This hotfix is for the missing Function Enabling System (FES) test plan which is used for SWAP (=software as product) and/or FOD (=function on demand) activations on a 2023 Q4 eTron. This missing test will be added to the Audi Brand update that will be released around October 2nd.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| AOS-24-56 | Service bulletin | Aug 22, 2024 | 11007364 | |
| AOS-24-56 | Service bulletin | Aug 22, 2024 | 11007283 |
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 1 model year this bulletin names have filed 30 complaints with NHTSA since 2015. 4 of them name Engine — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Car alarmed that my EV had a major electrical issue and made sirens outside as to warn others to not come close and keep distance as if the car will catch fire or explode. I replicated this warning again sitting in the car. Fearing the car will catch fire I had it moved out of my garage.
2023 Audi Q4 e-tron · Engine · filed with NHTSA Apr 4, 2025 · ODI 11652841
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.
More bulletins about the engine
Source: same model, same component group25 other manufacturer communications filed against the Audi Q4 e-tron under the same component group (engine), newest first. The eight newest are listed; the rest are on the Audi list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB_2074640_3 | Service bulletin | Jun 26, 2026 | This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km. |
| TSB_2073867_3 | Service bulletin | Jun 4, 2026 | This bulletin provides information when DTC U140A00 Terminal 30 is stored in the ECM. |
| TSB_2081556_1 | Service bulletin | Apr 6, 2026 | This bulletin provides informatio when the rear corner view cannot be activated via the MMI with the reversing camera. |
| TSB_2051095_10 | Service bulletin | Feb 20, 2026 | This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded. |
| TSB_2021205_10 | Service bulletin | Feb 20, 2026 | This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures. |
| TSB_2060750_5 | Service bulletin | Jan 14, 2026 | This bulletin provides information regarding UV leak additive for finding oil leaks. |
| TSB_2074640_2 | Service bulletin | Dec 11, 2025 | This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km. |
| TSB_2073867_2 | Service bulletin | May 28, 2025 | This bulletin provides information when DTC U14A00 Terminal 30 is stored in the ECM. |
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 AOS-24-56 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 AOS-24-56 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 AOS-24-56 cover?
The manufacturer filed it against 1 model year: 2023 Audi Q4 e-tron. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.