BMW bulletin B066-25
BMW filed this with NHTSA as a manufacturer communication dated Nov 20, 2025, received Dec 1, 2025, about the engine. It names 9 model years across BMW and Rolls-Royce (2024–2026). A manufacturer communication 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.
One page for every brand it was filed under. Each brand’s bulletins: BMW · Rolls-Royce.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationExpansion Tank Return
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B066-25 | Other | Nov 20, 2025 | 11025855 | PDF, 287 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 themRolls-Royce 3 model years
A 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 40 complaints with NHTSA since 2015. 1 of them name 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.
Component: Engine / Fuel/Propulsion System / Engine Cooling Vehicle Odometer at Failure: 463 Miles Date of Incident: September 8, 2026 Description of Safety Hazard: While driving a brand-new 2026 BMW X5 with only 463 total miles on the odometer (purchased on July 30, 2026), the vehicle suffered a sudden and catastrophic manufacturing…
2026 BMW X5 · Engine · filed with NHTSA Sep 24, 2026 · ODI 11766793
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 group82 other manufacturer communications filed against these BMW models 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 |
|---|---|---|---|
| 0011320800 | Service campaign | Oct 21, 2026 | The cylinder head cover was not installed correctly at the assembly plant. |
| 0012870600 | Service campaign | Oct 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… |
| 1171901000 | Warranty extension | Sep 22, 2026 | The Exhaust Gas Recirculation (EGR) Cooler (with EGR Valve) and the Auxiliary Exhaust Gas Recirculation (EGR) Cooler limited warranty for de… |
| B121126 | Service bulletin | Sep 9, 2026 | Potential customer complaints with no fault codes stored / No MIL displayed. 1. “Rough idle after idling for a longer period of time” 2. “Ve… |
| 0011460700 | Emissions | Aug 26, 2026 | The return springs on the exhaust camshaft followers (switchable rocker arm) may break. |
| B064426 | Other | Aug 22, 2026 | Air Flap Return |
| B130126 | Service campaign | Aug 14, 2026 | Delivery Stop - Exhaust System Gasket |
| 0018030200 | Service campaign | Aug 14, 2026 | An exhaust gas sealing ring between thelower catalytic converter and upper catalyticconverter may be missing (1). |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for BMW and Rolls-Royce, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is BMW B066-25 a recall?
No. A manufacturer communication 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 B066-25 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 B066-25 cover?
The manufacturer filed it against 9 model years across 2 brands (BMW and Rolls-Royce): 2026 BMW 5 Series, 2026 BMW 7 Series, 2026 BMW X5, 2026 BMW X6, 2026 BMW X7, 2026 BMW XM and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.