Volkswagen bulletin Dealer 90W9
What it saysOn vehicles of a limited production period, because of a data bus diagnostic interface software fault (faulty routing implementation), there is the possibility of a partial or complete failure of communication between… NHTSA’s full summary ↓
Volkswagen filed this with NHTSA as a service bulletin dated Feb 26, 2024, received Mar 6, 2024, about the back over prevention. It names 1 model year (2023). 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 communicationOn vehicles of a limited production period, because of a data bus diagnostic interface software fault (faulty routing implementation), there is the possibility of a partial or complete failure of communication between the Generic Scan Tool (GST) and the vehicle. As the result, it may be difficult to retrieve vehicle data.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Dealer 90W9 | Service bulletin | Feb 26, 2024 | 10250764 | PDF, 177 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 1 model year this bulletin names have filed 23 complaints with NHTSA since 2015. 6 of them name Back Over Prevention — 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.
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 back over prevention
Source: same model, same component group2 other manufacturer communications filed against the Volkswagen Golf / GTI under the same component group (back over prevention), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TT 98-22-01 | Service bulletin | May 22, 2025 | The diagnostic code B2F0100 with symptom code 1124417 in the front sensors/front camera for driver assist systems control unit -R242- |
| Bulletin 90W9 | Service bulletin | Feb 27, 2024 | On vehicles of a limited production period, because of a data bus diagnostic interface software fault (faulty routing implementation), there… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Volkswagen, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Volkswagen Dealer 90W9 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 Dealer 90W9 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. Every Volkswagen warranty extension on file lists the ones Volkswagen has filed.
Which vehicles does Dealer 90W9 cover?
The manufacturer filed it against 1 model year: 2023 Volkswagen Golf / GTI. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.