Audi bulletin Circular 24iY
What it saysSome on-board diagnostic (OBD) functions do not fully meet certain regulatory requirements. NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Aug 15, 2023, received Sep 1, 2023, about the electrical system. It names 3 model years (2019–2020). 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 communicationSome on-board diagnostic (OBD) functions do not fully meet certain regulatory requirements. Consequently, the MIL may not illuminate when a misfire event occurs. This issue has no impact to tailpipe or evaporative emissions. Install updated engine control module (ECM) software.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Circular 24iY | Service bulletin | Aug 15, 2023 | 10241488 | PDF, 426 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 3 model years this bulletin names have filed 17 complaints with NHTSA since 2015. 10 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.
8/23/2021-I was slowing down at a red light and getting ready to stop but the light turned green and so high pushed on the gas to go before I got to a full stop. The battery warning light came on so I turned around to go back home can you swap cars. My fiancé had to go to work that day and took the vehicle.
2020 Audi A8 · Electrical System · filed with NHTSA Oct 6, 2021 · ODI 11435705
My grandson and I got in the car after being in a Lego store for 20 minutes. We tried to start the car to leave but the car started the electronic starting procedure but stoped. All kinds of malfunction and failure lights came on and EVERYTHING LOCKED UP. WE WERE TRAPPED IN THE CAR AND COULD NOT ESCAPE
2019 Audi A8 · Electrical System · filed with NHTSA Jun 21, 2024 · ODI 11595729
Start system malfunction causes the car to randomly lose ALL power and roll back when at a stopped, causing the car to be disabled and unable to start again. Faults indicate a failure of the 48V belt driven starter generator. Parts to repair defect are severely back ordered, taking months to obtain
2020 Audi A8 · Electrical System · filed with NHTSA Nov 26, 2022 · ODI 11494953
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 group410 other manufacturer communications filed against these Audi models 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_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… |
| TSB_2081006_3 | Service bulletin | Sep 14, 2026 | This Pending Service Solution requests that technicains create a record in the PSS database when the Bluetooth/Audi smartphone interface con… |
| TSB_2083188_1 | Service bulletin | Sep 9, 2026 | This bulletin is a help guide for Audi connect remote start. |
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 Circular 24iY 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 Circular 24iY 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 Circular 24iY cover?
The manufacturer filed it against 3 model years: 2020 Audi A8, 2019 Audi A8, 2020 Audi S8. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.