Audi bulletin DC_ADTOOLNOTICE2
What it saysA potentially critical self-discharge condition exists in certain high-voltage battery modules that, in some instances, may lead to thermal overload, possibly resulting in smoke or a fire. NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Feb 2, 2024, received Mar 6, 2024, about the electrical system. It names 4 model years (2019–2022). 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 communicationA potentially critical self-discharge condition exists in certain high-voltage battery modules that, in some instances, may lead to thermal overload, possibly resulting in smoke or a fire. A high-voltage battery overheating increases the risk of a fire. Affected high-voltage batteries may experience a loss of range and/or performance as an early indication. - UPDATED
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| DC_ADTOOLNOTICE2 | Service bulletin | Feb 2, 2024 | 10250231 | PDF, 738 KB |
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 4 model years this bulletin names have filed 174 complaints with NHTSA since 2015. 96 of them name Electrical System — 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.
Audi etron sportback lost power while driving on a busy roadway at 60mph. Car lost about 10-15 mph speed within seconds due to the vehicle weight. By the time the "drive system malfunction" and "electical system malfunction " warning lights came on I realized I could not accelerate, and and coasted to a stop on the shoulder over maybe 15…
2020 Audi e-tron · Electrical System · filed with NHTSA May 22, 2025 · ODI 11662595
My 2019 Audi e-tron developed a sunroof leak. On , Audi Exchange in Highland Park, IL repaired it as a known issue partially covered by warranty; I paid $526.53. On it leaked heavily again from the same area, soaking the headliner, dashboard, carpet, foot wells and seats. The dealer said a different issue caused it; I paid $388.88 more.
2019 Audi e-tron · Electrical System · filed with NHTSA Oct 22, 2026 · ODI 11772949
The vehicle's central locking system does not properly communicate with the keyfob resulting in the doors not unlocking as intended. I have had my child in the car seat in the back and if i accidentantly touch the handle the wrong way the doors will lock and I am unable to use the unlock feature to get my kid out.
2021 Audi e-tron · Electrical System · filed with NHTSA Dec 1, 2025 · ODI 11702257
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 electrical system
Source: same model, same component group359 other manufacturer communications filed against the Audi e-tron under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Audi list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB_2073858_13 | Service bulletin | Sep 24, 2026 | This bulletin provides information when there are various warning messages in the instrument cluster; electric motor leaking. P0AA600 |
| TSB_2083385_1 | Service bulletin | Sep 23, 2026 | This bulletin provides information when there is a warning message in the instrument cluster about external sound. |
| TSB_2076396_3 | Service bulletin | Sep 23, 2026 | This bulletin provides information regarding driver assist systems; Audi adaptive light, Audi pre sense system fault, adaptive cruise assis… |
| TSB_2063336_5 | Service bulletin | Sep 23, 2026 | This bulletin provides information when DTC C12BFF0 is stored in the lane change modeul or the radar sensor; intersection assist/lane change… |
| TSB_2068573_6 | Service bulletin | Sep 18, 2026 | This bulletin provides information when the rear parking sensor sometimes does not work, rear parking sensor loose, rear parking sensor faul… |
| TSB_2074059_4 | Service bulletin | Sep 15, 2026 | This bulletin provides general information about SOS Emergency Assist. |
| TSB_2058077_11 | Service bulletin | Sep 15, 2026 | This bulletin provides information when there is an Audi pressense warning, warning jolt, and/or brake engagement. |
| TSB_2054202_8 | Service bulletin | Sep 15, 2026 | This bulletin provides information when there is an Audi adaptive light system malfunction; DTC C12B3FA is stored in the control module for… |
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 DC_ADTOOLNOTICE2 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 DC_ADTOOLNOTICE2 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 DC_ADTOOLNOTICE2 cover?
The manufacturer filed it against 4 model years: 2022 Audi e-tron, 2021 Audi e-tron, 2020 Audi e-tron, 2019 Audi e-tron. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.