Volkswagen bulletin Circular 40S9
What it saysDuring strut assembly, an issue may have caused a deformation of the strut mount. NHTSA’s full summary ↓
Volkswagen filed this with NHTSA as a service bulletin dated Jun 7, 2023, received Jul 10, 2023, about the suspension. 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 communicationDuring strut assembly, an issue may have caused a deformation of the strut mount. If the strut mount is deformed, it can lead to improper torque on one of the bolted connections on the right or left suspension strut mounting. Inspect and, if necessary, replace the right and/or left suspension strut mounting(s).
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Circular 40S9 | Service bulletin | Jun 7, 2023 | 10238204 | PDF, 585 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 5Q0-412-331-E | MOUNTING | — |
Read by machine from the document NHTSA serves (12 pages), read Sep 30, 2026. A part number is shown only where it matches Volkswagen’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.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the macpherson strut for the 2023 Golf / GTI →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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.
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 suspension
Source: same model, same component group4 other manufacturer communications filed against the Volkswagen Golf / GTI under the same component group (suspension), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| V4418012043620_9 | Service bulletin | Dec 3, 2025 | Alignment Submission Form |
| V4016012043146_4 | Service bulletin | Nov 18, 2025 | What is and what is not a leaking suspension strut. |
| V4616012043146_3 | Service bulletin | Jul 14, 2025 | How to identify and when to replace a leaking strut |
| Dealer 40S9 | Service bulletin | Jun 6, 2023 | Dealer Letter to announce Service Action 40S9 / Suspension Strut Mountings |
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 Circular 40S9 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 40S9 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 Circular 40S9 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.