BMW bulletin B540125
BMW filed this with NHTSA as a service bulletin dated Jul 17, 2025, received Jul 28, 2025, about the structure. 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhen the vehicle is parked in the sun for longperiod of time, the convertible top will notopen. Note: While pressing and holding down the top’s actuation button for a normal top opening cycle- The side windows open The rear bow folds upwards The convertible top unlocks at the front bow The convertible top compartment lid moves backwards but the convertible top does not open. If the convertible top is pushed upward by hand in the A-pillar area, the convertible top opens.
Document filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| B540125 | Service bulletin | Jul 17, 2025 | 11020929 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. 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. Quote it 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.
Common questions
Source: NHTSA, 49 CFR 579.5Is BMW B540125 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 B540125 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.
Which vehicles does B540125 cover?
The manufacturer filed it against 1 model year: 2023 BMW 8 Series. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.