BMW bulletin B540126
What it saysA “rattling” noise may be heard from the rear portion of the headliner when traveling over rough surfaces. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Jan 30, 2026, received Feb 2, 2026, about the structure. It names 3 model years (2024–2026). 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 communicationA “rattling” noise may be heard from the rear portion of the headliner when traveling over rough surfaces.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B540126 | Service bulletin | Jan 30, 2026 | 11027997 | PDF, 1,077 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 51 45 2 353 024 | Set of felt strip-adhesive | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 51 99 000 | Work time to install the required thickness and amount of felt on the left and right… | 5 FRU |
Read by machine from the document NHTSA serves (5 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.
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 3 model years this bulletin names have filed 13 complaints with NHTSA since 2015. 2 of them name Structure — 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.
Driver Side - Significant Wind Noise during highway driving. Ferman BMW stated excessive movement at pivot joint of driver's mirror. Installed New Mirror. Noise persistent Wesley Chapel BMW Completed Noise Test
2026 BMW X6 · Structure · filed with NHTSA Oct 17, 2025 · ODI 11694096
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 structure
Source: same model, same component group21 other manufacturer communications filed against the BMW X6 under the same component group (structure), newest first. The eight newest are listed; the rest are on the BMW list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B010226DCS | Other | Aug 28, 2026 | BMW Notice of the Court’s Final Approval for Shark-Fin Antenna Settlement (X3, X4, X5, X6, X7) |
| B010226 | Service bulletin | Aug 25, 2026 | Rear Roof Antenna Shark Fin Cover Sealing Issue |
| 6520900300 | Warranty extension | May 21, 2026 | SHARK FIN ROOF ANTENNA SEALING SETTLEMENT Extended Warranty |
| B063226 | Other | May 13, 2026 | Hood Return |
| B641224 | Service bulletin | May 4, 2026 | 1. Use of aftermarket accessory hang-on cellular phone holders and/or air fresheners can break the instrument panel air vent slats. Damage a… |
| B640320 | Service bulletin | May 4, 2026 | CENTER CONSOLE / CUP HOLDER GETS HOT WHEN THE HEAT IS ON: The center console and front cup holder get noticeably too warm to the touch on lo… |
| B512224 | Service bulletin | Mar 18, 2026 | On the main door seal, detachment behaviorcan be detected at the sealing joint . Over time, the seal gradually and increasinglydetaches whic… |
| 5174900200 | Warranty extension | Mar 6, 2026 | The Radiator Grilles Lower Active Air Flap Assembly limited warranty for defects in materials and/or workmanship has been extended to 15 yea… |
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 B540126 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 B540126 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 B540126 cover?
The manufacturer filed it against 3 model years: 2026 BMW X6, 2025 BMW X6, 2024 BMW X6. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.