Audi bulletin AVIN4APIN20251001
What it saysSummary of all Vin-4-Pin topics: Brake pulsation MIB3 takes a long time to load at startup Difficult to fuel, EVAP canister part block P001700 crank-cam correlation MIL on: DTC U041800 drive motor coolant and gear oil… NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Oct 1, 2025, received Nov 8, 2025. It names 62 model years (2019–2025). 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 communicationSummary of all Vin-4-Pin topics: Brake pulsation MIB3 takes a long time to load at startup Difficult to fuel, EVAP canister part block P001700 crank-cam correlation MIL on: DTC U041800 drive motor coolant and gear oil contamination PPE/PPC time off by 1 hour
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| AVIN4APIN20251001 | Service bulletin | Oct 1, 2025 | 11025251 |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 8W0201801M | parts block | — | eBay Motors → |
Read by machine from the document NHTSA serves (1 page), read Sep 30, 2026. A part number is shown only where it matches Audi’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 themand 22 more on this site: 2022 Audi S5, 2021 Audi S5, 2025 Audi S6, 2024 Audi S6, 2025 Audi S7, 2024 Audi S7, 2025 Audi S8, 2024 Audi S8, 2025 Audi SQ5, 2024 Audi SQ5, 2025 Audi SQ6 e-tron, 2025 Audi SQ7, 2024 Audi SQ7, 2025 Audi SQ8, 2024 Audi SQ8, 2025 Audi SQ8 e-tron, 2024 Audi SQ8 e-tron, 2023 Audi e-tron, 2022 Audi e-tron, 2021 Audi e-tron, 2020 Audi e-tron, 2019 Audi 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 62 model years this bulletin names have filed 505 complaints with NHTSA since 2015.
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.
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 AVIN4APIN20251001 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 AVIN4APIN20251001 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 AVIN4APIN20251001 cover?
The manufacturer filed it against 62 model years: 2025 Audi A4, 2024 Audi A4, 2023 Audi A4, 2022 Audi A4, 2021 Audi A4, 2025 Audi A5 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.