BMW bulletin B640123
What it saysThe windshield may mist over when it is raining while driving in Eco Pro mode At an outside temperature between 50 F and 55 F, the seat heating remains cold despite thepre-temperature setting The customer may report one… NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Dec 21, 2023, received Jan 3, 2024, about the visibility/wiper. It names 2 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 communicationThe windshield may mist over when it is raining while driving in Eco Pro mode At an outside temperature between 50 F and 55 F, the seat heating remains cold despite thepre-temperature setting The customer may report one or both concerns.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B640123 | Service bulletin | Dec 21, 2023 | 10248090 | 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 2 model years this bulletin names have filed 100 complaints with NHTSA since 2015. 6 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.
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 visibility/wiper
Source: same model, same component group3 other manufacturer communications filed against the BMW X1 under the same component group (visibility/wiper), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B660925 | Service bulletin | Jul 14, 2025 | When the rear-view camera display is activated, moving objects appear to be juddering in the image. |
| B540223 | Service bulletin | Oct 6, 2023 | Water ingress from the panoramic sunroof (aka moonroof), either on the front driverâs and/or passengerâs side. |
| B612315 | Service bulletin | Nov 1, 2020 | "The Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full. INFORMATION The use of a ""non-approved"" washer flui… |
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 B640123 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 B640123 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 B640123 cover?
The manufacturer filed it against 2 model years: 2024 BMW X1, 2023 BMW X1. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.