Audi bulletin TSB_2079117_1
What it saysThis bulletin provides information when the Exhaust emissions warning lamp 9MIL) is active due to event memory entries in diagnostic address 00C5. NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Aug 29, 2025, received Sep 4, 2025, about the engine. It names 10 model years (2020–2025). 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 Exhaust emissions warning lamp 9MIL) is active due to event memory entries in diagnostic address 00C5.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TSB_2079117_1 | Service bulletin | Aug 29, 2025 | 11022714 |
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 10 model years this bulletin names have filed 342 complaints with NHTSA since 2015. 66 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.
The first time, while driving at 50-55mph, the engine decelerated suddenly. After about 10-15 seconds struggles with the gas pedal and brake pedal, the car accelerated normally. I pulled safely to side of the road to shut off the engine and start again. Things seemed to work like normal. The control panels did not show any warning signs.
2021 Audi A7 · Engine · filed with NHTSA Apr 5, 2026 · ODI 11729313
Audi 2020 A8L Engine Fire 3/6/2024 Confirmed by Fire Department, American Family Insurance Unclear if it has been inspected by the Audi U.S. No indication has been received. Incident occurred March 6th, 2024 at approximately 3pm. Operated vehicle in early morning to meet friends for coffee at a nearby coffee shop.
2020 Audi A8 · Engine · filed with NHTSA Apr 8, 2024 · ODI 11581726
Our vehicle started jerking when it transitioned from EV mode to Hybrid (gas engine). I found TSB 2079556, which describes exactly the diagnostic codes our car has for all eight battery packs. This is clearly a known problem, and as the car is out of its original warranty I would have to pay for this myself.
2020 Audi Q5 · Engine · filed with NHTSA Nov 7, 2025 · ODI 11698217
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 group199 other manufacturer communications filed against these Audi models 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_2079927_3 | Service bulletin | Sep 30, 2026 | This bulletin provides information when the exhaust emissions warning lamp lights up; DTC P050A; 2.0 ltr 4-cyl. |
| TSB_2083393_1 | Service bulletin | Sep 25, 2026 | This bulletin provides information when the starter/generator drive belt is noisy or came off. |
| TSB_2069531_2 | Service bulletin | Sep 25, 2026 | This bulletin provides information when the MIL is on, EVAP pressure/temp sensor incorrect DTC displayed: P202400, P045000, P045200, P24D600… |
| TSB_2083287_1 | Service bulletin | Sep 18, 2026 | This Pending Service Solution (PSS) requests that technicians create a record in the PSS database when DTC P001400 camshaft position is stor… |
| TSB_2081030_4 | Service bulletin | Sep 14, 2026 | This bulletin provides information when there is an abnormal knocking noise from the engine compartment; V6 3.0L TFSI. |
| SM 34-2026 | Other | Aug 21, 2026 | This special notice is to inform dealers to return the parts listed and only order the successor parts going forward. |
| TSB_2079917_2 | Service bulletin | Aug 20, 2026 | This bulletin provides information when the engine can only be started with a delay; 2.0 ltr. 4 cyl. TFSI. |
| TSB_2081030_3 | Service bulletin | Aug 13, 2026 | This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI. |
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_2079117_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 TSB_2079117_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 TSB_2079117_1 cover?
The manufacturer filed it against 10 model years: 2022 Audi A7, 2021 Audi A7, 2021 Audi A8, 2020 Audi A8, 2025 Audi Q5, 2024 Audi Q5 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.