BMW bulletin B120723
What it saysVehicle exhibits a slight acceleration delay when taking off from a MSA (automatic engine start-stop function) stop. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Aug 26, 2024, received Dec 6, 2023, about the engine — 2 documents under this number. It names 9 model years (2016–2024). 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 communicationVehicle exhibits a slight acceleration delay when taking off from a MSA (automatic engine start-stop function) stop.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B120723 | Service bulletin | Aug 26, 2024 | 11006720 | PDF, 144 KB |
| B120723 | Service bulletin | Nov 17, 2023 | 10245368 | PDF, 128 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 9 model years this bulletin names have filed 525 complaints with NHTSA since 2015. 102 of them name Electrical System, Engine — 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 contact owns a 2019 BMW X1. The contact stated that the emergency call error light illuminated the instrument panel. In December of 2024, the contact received notification regarding an extended warranty coverage for the battery to be replaced. The contact was unable to immediately take the vehicle to the dealer due to other reasons.
2019 BMW X1 · Electrical System · filed with NHTSA Mar 12, 2025 · ODI 11647914
Check engine light continuously goes on and off. As a result, had car diagnostic tested which resulted in the following $966.79 repairs: -remove & replace evaporative emissions system leak detection unit using the following parts: -vapor canister purge valve -fuel vapor detection pump w/ ventilation line leak diagnostic pump.
2022 BMW X1 · Engine · filed with NHTSA Jun 25, 2025 · ODI 11669116
Error msg indicating “secure vehicle against rolling” appeared. Also, “Transmission: Secure vehicle with parking brake when stopped. Consult service center.” Apparently from many comments from other BMW owners and mechanics the issue is common and is related to an inexpensive spring that has broken in the shifter box.
2017 BMW X1 · Electrical System · filed with NHTSA Dec 22, 2021 · ODI 11444699
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 engine
Source: same model, same component group10 other manufacturer communications filed against the BMW X1 under the same component group (engine), newest first. The eight newest are listed; the rest are on the BMW list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 0099020300 | Emissions | Jul 10, 2026 | Due to an implementation error in various OBD diagnostics in the vehicle's control units, in very rare cases itmay happen that stored fault… |
| 1390900300 | Warranty extension | Jun 29, 2026 | For this vehicle, the EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years… |
| B120324 | Service bulletin | Feb 12, 2026 | The Engine Malfunction Warning is illuminated, and the following fault code is stored in the DME- FC 034AEF Exhaust Cold Start, Not Controll… |
| B061726 | Other | Feb 6, 2026 | Turbocharger Return |
| B064325 | Other | Aug 19, 2025 | Oil Line Return |
| B062525 | Other | Mar 26, 2025 | Bearing Shell Return |
| 0011740700 | Service campaign | Jul 25, 2024 | The vibration dampener side cover may not have been pressed in correctly, resulting in a vibration or arough running sensation. |
| B010224 | Warranty extension | May 2, 2024 | EVAP SYSTEM PURGE (VENT) VALVE EXT LTD WTY (ELW) 15/150 |
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 B120723 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 B120723 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 B120723 cover?
The manufacturer filed it against 9 model years: 2024 BMW X1, 2023 BMW X1, 2022 BMW X1, 2021 BMW X1, 2020 BMW X1, 2019 BMW X1 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.