BMW bulletin B640424
What it saysThe center air vent on the left (a) is closed. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Mar 8, 2024, received Apr 1, 2024, about the equipment. It names 7 model years (2023–2024). 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 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.
1. The center air vent on the left (a) is closed. All other air vents on the left side then only blow cold air intothe passenger area. OR 2. Both center (b) air vents are closed. All other air vents then only blow cold air into the passenger area. OR 3. The center air vent on the right (c) is closed. All other air vents on the right side then only blow cold airinto the passenger area.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B640424 | Service bulletin | Mar 8, 2024 | 10252041 | PDF, 1,160 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 7 model years this bulletin names have filed 103 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 equipment
Source: same model, same component group18 other manufacturer communications filed against these BMW models under the same component group (equipment), newest first. The eight newest are listed; the rest are on the BMW list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B010122 | Service bulletin | Jan 21, 2026 | With the court's FINAL approval, BMW of North America, LLC (BMW NA) has entered into a nationwide settlement with the plaintiffs in the foll… |
| B610124 | Service bulletin | Jan 6, 2025 | When driving over rough surfaces, a low-frequency rattling noise can be heard inside the vehicle's cabin. The noise typically sounds as tho… |
| B640124 | Service bulletin | Jun 17, 2024 | A drumming noise is heard when the air conditioning system is operating. Service parts are not yet available for this repair. This bulletin… |
| B650121 | Service bulletin | Jun 12, 2024 | SPORADIC FAILURE OR CRACKING NOISE IN BASS SPEAKERS: No Bass or a cracking noise can be heard from the bass speakers. |
| B650421 | Service bulletin | Jun 4, 2024 | RETROFIT SATELLITE RADIO (OPTION CODE SA655): The affected vehicles were produced with Preparation BMW Satellite Radio (option code SA 693)… |
| B613233 | Service bulletin | Apr 16, 2024 | A small flap of sound insulation material may come into contact with some of the 12 V B+ cables at the remote B+ charging point terminal… |
| B610321 | Service bulletin | Feb 28, 2024 | SITUATION BMW AG is conducting a Voluntary Emissions Recall (effective April 23, 2021) on a certain Model Year 2020 - 2021 BMW vehicles th… |
| B660324 | Service bulletin | Feb 22, 2024 | A quality check showed that the Remote-Control Parking token was not activated in the current software for the vehicles affected. |
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 B640424 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 B640424 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 B640424 cover?
The manufacturer filed it against 7 model years: 2024 BMW 5 Series, 2023 BMW 5 Series, 2024 BMW 7 Series, 2023 BMW 7 Series, 2024 BMW i5, 2024 BMW i7 and more. 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: built on or before Jul 2024 — the build date is on the certification label in the driver’s door jamb.