BMW bulletin B520925
What it saysThe seat lumbar system “Massage” will not function if the module needs to be initialized. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Jul 22, 2025, received Jul 28, 2025, about the electrical system. It names 4 model years (2024). 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 seat lumbar system “Massage” will not function if the module needs to be initialized. This can occur toeither the driver’s and/or passenger side seat. Here is a list of possible faults: Seat pneumatics module front right SPNM _ VR 025908 - SPNMVR: Control unit is not coded 02590B - SPNMVR: Control unit is not encoded for the vehicle 806927 - SPNMVR: Installation location not taught in Seat pneumatics module front left SPNM _ VL 025308 - SPNMVL: Control unit is not coded 02530B - SPNMVL: Control unit is not encoded for the vehicle 8067A7 - SPNMVL: Installation location not taught in Seat Module Driver FAS SMFA 80301E - No seat adjustment because of engine start conditions Seat Module Passenger BFS SMBF 802C1E - No seat adjustment because of engine start conditions Seat Module Driver’s Side Rear FAH SMFAH 802E1E - No seat adjustment because of engine start conditions Seat Module Passenger Side Rear BFH SMBFH 802A1E - No seat adjustment because of engine start conditions
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B520925 | Service bulletin | Jul 22, 2025 | 11020931 | PDF, 177 KB |
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 4 model years this bulletin names have filed 223 complaints with NHTSA since 2015. 34 of them name Electrical System — 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.
The air condition is inadequate for temperatures above 80°. Due to the inadequacy of the coldness and the speed at which the fan blows, all passengers in a fully loaded vehicle complain of excessive heat temperatures Safety is an issue if left in the vehicle for a long period of time without proper temperatures being reached for all in…
2024 BMW X7 · Electrical System · filed with NHTSA Aug 22, 2024 · ODI 11610316
6 weeks after purchasing the car, the 'check engine' light came on. The dealer evaluated the car (although it took nearly 2 weeks to simply diagnose the issue) and found that the 'high voltage battery control module' was bad and needed replacement. Then, I waited 2 more weeks for the part to be shipped from Germany.
2024 BMW X5 · Electrical System · filed with NHTSA Mar 19, 2024 · ODI 11578230
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 electrical system
Source: same model, same component group85 other manufacturer communications filed against these BMW models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the BMW list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B611826 | Service bulletin | Sep 17, 2026 | Due to unfavorable software, the Storage Management Electronics (SME) will not show fault codes that trigger the Malfunction Indicator Lamp… |
| B630526 | Service bulletin | Sep 8, 2026 | After programming the vehicle via ISTA/RSUto I-level …26-03-5xx, customer may reportsome of the interior ambient lighting strips(arrows) may… |
| 0034040300 | Service campaign | Aug 20, 2026 | After replacement of the Integrated Braking system (IB)/Power Brake the total distance covered might be lower than when handed over to the w… |
| B652026 | Service bulletin | Jul 23, 2026 | The Central Information Display (CID) side of the Multifunction Display (MFD) may flicker intermittently. Theflickering manifests itself in… |
| B840226 | Service campaign | Jul 10, 2026 | Once the Telematics Module (TCB2) enters sleep mode, a BMW Data Services trigger for Remote Services… |
| B610126 | Service bulletin | Jun 11, 2026 | SITUATION During vehicle start-up the Secure Element (SE) of the BCP may fail causing communication errors. TheCheck Control message “Drive… |
| 0012810600 | Service campaign | Jun 11, 2026 | In these vehicles with an S68 engine, an incorrect diagnosis of the Valvetronic (VVT) may occur. Undercertain operating conditions, the soft… |
| B651426 | Service bulletin | Jun 4, 2026 | The vehicle may experience various operational issues with Apple CarPlay Projected Modes such as: Dropped connections No automatic reconnect… |
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 B520925 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 B520925 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 B520925 cover?
The manufacturer filed it against 4 model years: 2024 BMW X5, 2024 BMW X6, 2024 BMW X7, 2024 BMW XM. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.