Audi bulletin TSB_2079812_2
What it saysThis bulletin provides information when the message "Four-wheel drive fault" is displayd in the instrument closter on rear wheel drive vehicles. NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Dec 18, 2025, received Jan 7, 2026, about the power train. It names 2 model years (2025). 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 communicationThis bulletin provides information when the message "Four-wheel drive fault" is displayd in the instrument closter on rear wheel drive vehicles.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TSB_2079812_2 | Service bulletin | Dec 18, 2025 | 11027411 |
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: 2025 Audi S6 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.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 2 complaints with NHTSA since 2015. 1 of them name Power Train — 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.
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 power train
Source: same model, same component group4 other manufacturer communications filed against these Audi models under the same component group (power train), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB_2080044_5 | Service bulletin | Sep 25, 2026 | This bulletin provides informaiton when position "P" cannot be selected. |
| TSB_2074808_4 | Service bulletin | May 6, 2026 | The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content… |
| TSB_2079812_3 | Service bulletin | Jan 22, 2026 | This bulletin provides information when the message "Four-wheel drive fault" is displayd in the instrument closter on rear wheel drive vehic… |
| TSB_2077740_4 | Service bulletin | Jul 22, 2025 | This bulletin rpovides information when the gear cannot be selected in cold weather (DTCs U303500; U029400; U012900). |
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 TSB_2079812_2 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 TSB_2079812_2 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 TSB_2079812_2 cover?
The manufacturer filed it against 2 model years: 2025 Audi A6 Sportback e-tron, 2025 Audi S6 Sportback E-Tron. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.