BMW bulletin B520326
What it saysThe front seat backrest has a blotchydiscolored haze. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Jun 13, 2026, received Jul 3, 2026, about the seats. It names 1 model year (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 communicationThe front seat backrest has a blotchydiscolored haze.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B520326 | Service bulletin | Jun 13, 2026 | 11034459 | PDF, 320 KB |
What the document itself lists
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 52 00 001 | Seat- locating complaint(s) (Work time) Visual inspection Up to | 2 FRU |
| 52 99 010 | BMW vehicle interior cosmetic repair (Cleaning one side/inside and outside) | 2 FRU |
| 52 99 000 | Work time for removing and installing the rear panel for the other front seat backrest | 1 FRU |
Read by machine from the document NHTSA serves (4 pages), read Sep 30, 2026. A part number is shown only where it matches BMW’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 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 38 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 seats
Source: same model, same component group3 other manufacturer communications filed against the BMW X3 under the same component group (seats), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 0061780900 | Service campaign | Sep 10, 2026 | The seat module for the driver’s seat maycontain an incomplete solder connection. Ifthis connection breaks over time, the seat canonly be ad… |
| B611726 | Service campaign | Aug 27, 2026 | Delivery Stop - Front Seat Module |
| B521823 | Service bulletin | Dec 15, 2023 | A noise can be heard from underneath the seat while the seat is being moved either forwards or backwards. This can occur to the driverâs a… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for BMW, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is BMW B520326 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 B520326 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 BMW warranty extension on file lists the ones BMW has filed.
Which vehicles does B520326 cover?
The manufacturer filed it against 1 model year: 2025 BMW X3. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.