BMW service campaign eB340225
What it saysDelivery Stop - Brake Fluid Expansion Tank NHTSA’s full summary ↓
BMW filed this with NHTSA as a service campaign dated Mar 6, 2025, received Apr 3, 2025, about the service brakes. It names 3 model years (2025). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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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.
Delivery Stop - Brake Fluid Expansion Tank
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| eB340225 | Service campaign | Mar 6, 2025 | 11016435 | PDF, 101 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 3 model years this bulletin names have filed 19 complaints with NHTSA since 2015. 4 of them name Service Brakes — 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.
Before the collision, my 2025 BMW 330i stalled when I tried to accelerate, so I moved into the right slow lane. The vehicle also stalled during the collision. My VIN lookup shows an unrepaired recall involving the starter-generator. I do not know whether the recall issue caused the stalling.
2025 BMW 3 Series · Service Brakes · filed with NHTSA Oct 6, 2026 · ODI 11769218
We were driving on a local road and saw the car ahead parked at the traffic light. We began to brake from a safe distance. The car began slowing but instead of coming to a full stop, the brake resisted, the car made an odd sound, and instead the car accelerated into the car in front of us.
2025 BMW 4 Series · Service Brakes · filed with NHTSA Sep 29, 2025 · ODI 11690335
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 service brakes
Source: same model, same component group9 other manufacturer communications filed against these BMW models under the same component group (service brakes), newest first. The eight newest are listed; the rest are on the BMW list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 0034410300 | Service campaign | Aug 27, 2026 | The protective film which covers the 6 threaded connection holes on the DSC hydro unit may not have been completely removed before the brake… |
| B320426 | Service campaign | Jul 23, 2026 | Hydro Unit DSC |
| B062826 | Other | Apr 24, 2026 | Brake Hose Return |
| B340925 | Service bulletin | Dec 17, 2025 | There may be an internal leakage in the brake fluid expansion tank (aka brake fluid reservoir). In the rarecase of a leak, the filling level… |
| 0034200300 | Service campaign | Jul 30, 2025 | There may be an internal leakage in the brake fluid expansion tank (aka brake fluid reservoir). In the rare case of a leak, the filling leve… |
| B341025 | Service bulletin | Jul 14, 2025 | After programming from the I-Levels between …24-03-505 and lower than …24-03-540 to I-Level …24-11-530 or higher, the following CCM may be d… |
| B340225 | Service campaign | Apr 3, 2025 | Due to a manufacturing defect, there might be an internal leakage of the brake fluid expansion tank. In therare case that there is a leakage… |
| 3433900200 | Warranty extension | Nov 14, 2024 | BMW of North America, LLC(BMW NA) is extending the limited warranty forthe vehicle’s Brake Servo Unit’s ElectricVacuum Pump assembly to: 15… |
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 eB340225 a recall?
No. A service campaign 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 eB340225 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does eB340225 cover?
The manufacturer filed it against 3 model years: 2025 BMW 2 Series, 2025 BMW 3 Series, 2025 BMW 4 Series. 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: 2025 BMW: built on or after 16 Oct 2024; G20 3 Series Sedan: built 28 Nov 2024 – 7 Feb 2025; G22 4 Series Coupe: built 28 Oct 2024 – 13 Jan 2025 — the build date is on the certification label in the driver’s door jamb.