BMW bulletin B520623
What it saysBMW AG has issued a Delivery Stop (effective March 13, 2023) on certain Model Year 2023 BMW X6 SAC vehicles that were produced between March 1, 2023, and March 7, 2023. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Jan 2, 2024, received May 1, 2023, about the seats — 3 documents under this number. It names 4 model years (2020–2023). 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 communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
BMW AG has issued a Delivery Stop (effective March 13, 2023) on certain Model Year 2023 BMW X6 SAC vehicles that were produced between March 1, 2023, and March 7, 2023. A metal stamping error during production, on a small amount of the affected vehicles.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B520623 | Service bulletin | Jan 2, 2024 | 10249022 | PDF, 5,624 KB |
| B520623 | Service bulletin | May 1, 2023 | 10238082 | not found |
| B520623 | Service bulletin | Mar 1, 2023 | 10235188 | not found |
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.
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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 4 model years this bulletin names have filed 22 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 group4 other manufacturer communications filed against the BMW X6 under the same component group (seats), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B520524 | Service bulletin | Aug 7, 2024 | A rattling noise can be heard emanating from the area of the rear seat backrest of the second row ofseats. The noise does not occur when the… |
| B521019 | Service bulletin | Mar 29, 2024 | THIGH SUPPORT UPHOLSTERY DETACHES FROM SEAT. The seat leather upholstery detaches from the front of the thigh support (aka knee bolster) of… |
| B522319 | Service bulletin | Nov 22, 2023 | With the launch of the G05 (X5) Sports Activity Vehicle in August 2018, a new style of networked seats was introduced that have new operatin… |
| B520121 | Service bulletin | Aug 1, 2023 | SEAT FAILS TO INITIALIZE DUE TO MISSING END STOP: Front seat will not calibrate/initialize. |
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 B520623 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 B520623 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 B520623 cover?
The manufacturer filed it against 4 model years: 2023 BMW X6, 2022 BMW X6, 2021 BMW X6, 2020 BMW X6. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: 2023 BMW X6 SAC: built on or after 1 Mar 2023; G06 X6 Sports Activity Coupe: built 1 Mar 2023 – 7 Mar 2023 — the build date is on the certification label in the driver’s door jamb.