BMW bulletin B640723
What it says?BMW AG has issued a Delivery Stop (effective June 29, 2023) on certain Model Year 2023 BMW i4 vehicles that were produced between April 19, 2023, and April 24, 2023. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Aug 1, 2023, received Jul 24, 2023, about the electrical system — 2 documents under this number. It names 3 model years (2022–2023). 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communication?BMW AG has issued a Delivery Stop (effective June 29, 2023) on certain Model Year 2023 BMW i4 vehicles that were produced between April 19, 2023, and April 24, 2023. Contaminants were found on the printed circuit board of the electric A/C compressor (EKK).
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B640723 | Service bulletin | Aug 1, 2023 | 10242528 | not found |
| B640723 | Service bulletin | Jun 1, 2023 | 10239613 | 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.
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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 63 complaints with NHTSA since 2015. 24 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 only way I could explain it was as if my brakes were failing. After joining the bmw i4 group on Facebook and having my kids record while driving. I was able to capture the issue. The vehicle drive train will malfunction causing the vehicle to move while not in motion when at a stop light. The vehicle will accelerate on its on.
2023 BMW i4 · Electrical System · filed with NHTSA Apr 23, 2025 · ODI 11656435
The contact owns a 2023 BMW 430i. The contact received notice of NHTSA Campaign Number: 26V056000 (Electrical System). The contact stated that that on several occasions when starting the vehicle there was a hesitation while starting the vehicle.
2023 BMW 4 Series · Electrical System · filed with NHTSA May 4, 2026 · ODI 11735453
Vehicle was charging at home and spontaneously began smoking. Fire department called and determined it was the battery, began over heating and caught fire. Could have potentially exploded if they didn’t get their as soon as they did
2022 BMW i4 · Electrical System · filed with NHTSA Sep 28, 2026 · ODI 11767438
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 group56 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 |
|---|---|---|---|
| B610625 | Service bulletin | Aug 31, 2026 | Check Control message: "You can continue driving. Drivetrain” (00029) is displayed. The following fault code is stored in the CCU fault memo… |
| 0064450200 | Service campaign | Aug 12, 2026 | A faulty electric auxiliary heater may have been installed in the certain vehicles. This could result in thefailure of the electric auxiliar… |
| 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… |
| B610626 | Service bulletin | Jun 5, 2026 | Charging sessions cannot be started or they are interrupted while using a Level 2 AC high-power charging station, or with a Level 3 DC charg… |
| 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… |
| B652025 | Service bulletin | May 5, 2026 | After replacing the Multifunctional Display (MFD), the Central Information Display (CID) is black. The backlight of the CID is illuminated… |
| B610324 | Service bulletin | Apr 9, 2026 | Gen 5 BEV/PHEV vehicles may set the Combined Charging Unit (CCU) in programming abort due to no communication to the HV charge socket electr… |
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 B640723 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 B640723 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 B640723 cover?
The manufacturer filed it against 3 model years: 2023 BMW 4 Series, 2023 BMW i4, 2022 BMW i4. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.