Audi bulletin A4524392072977_1
What it saysThis bulletin provides information when the ABS/ESC Control unit cannot be reached; DTC U012100, ABS Control Module no communication is stored. NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Feb 14, 2024, received Mar 6, 2024, about the service brakes. It names 6 model years (2019–2024). 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 ABS/ESC Control unit cannot be reached; DTC U012100, ABS Control Module no communication is stored.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| A4524392072977_1 | Service bulletin | Feb 14, 2024 | 10250553 | PDF, 359 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.
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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 6 model years this bulletin names have filed 202 complaints with NHTSA since 2015. 25 of them name Service Brakes — 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.
When driving, my vehicle recieved multple warning messages at the same time. The first message was that my brake was malfunctioning, and when I went to brake, the brakes did not work. Thankfully, I wasn't going too fast when this happened and I was able to bring it down to a slow and turned into a lot.
2023 Audi e-tron · Service Brakes · filed with NHTSA Jun 5, 2026 · ODI 11742294
On five separate occasions across two separate drivers, we have experienced a partial brake failure in this vehicle. We strongly believe this to be a software defect and not a mechanical fault. On the e-Tron, the first portion of the brake pedal swing typically activates the regenerative braking.
2021 Audi e-tron · Service Brakes · filed with NHTSA Jan 31, 2025 · ODI 11639800
The contact owns a 2019 Audi E-Tron Quattro. The contact stated that while driving at various speeds, the vehicle intermittently failed to stop while depressing the brake pedal. The contact was forced to depress the brake pedal to the floorboard to stop the vehicle.
2019 Audi e-tron · Service Brakes · filed with NHTSA Sep 30, 2026 · ODI 11768005
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 service brakes
Source: same model, same component group31 other manufacturer communications filed against these Audi models under the same component group (service brakes), newest first. The eight newest are listed; the rest are on the Audi list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB_2077435_3 | Service bulletin | Aug 21, 2026 | This bulletin provides information when there are cracks on the friction ring surface on ceramic brake discs. |
| TSB_2069904_3 | Service bulletin | Aug 21, 2026 | This bulletin provides information for all models regarding brake sounds. |
| TSB_2069078_4 | Service bulletin | Aug 21, 2026 | This bulletin provides information on the zirconium insercts in the brake piston (ceramic brakes only). |
| TSB_2067132_4 | Service bulletin | Aug 21, 2026 | This bulletin provides information when there is corrosion on the friction survace of steel brake discs. |
| TSB_2075120_3 | Service bulletin | Aug 11, 2026 | This bulletin provides information about the general approach for brake vibration concerns. |
| TSB_2072304_4 | Service bulletin | Aug 11, 2026 | This bulletin provides information when there is an ABS/ESC speed sensor implausible signal. |
| TSB_2069904_2 | Service bulletin | Oct 22, 2025 | This bulletin provides information for all models regarding brake sounds. |
| TSB_2077435_2 | Service bulletin | Oct 21, 2025 | This bulletin provides information when there are cracks on the friction ring surface on ceramic brake discs. |
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 A4524392072977_1 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 A4524392072977_1 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 A4524392072977_1 cover?
The manufacturer filed it against 6 model years: 2024 Audi Q8, 2024 Audi SQ8, 2023 Audi e-tron, 2022 Audi e-tron, 2021 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.