MINI warranty extension 6450900300
What it saysThe high-voltage battery assemblys expansion valve limited warranty for defects in materials and/or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date. NHTSA’s full summary ↓
MINI filed this with NHTSA as a warranty extension dated May 19, 2025, received May 27, 2025, about the engine — 1 document under this number: M010125. It names 1 model year (2023). A warranty extension 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
What 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.
The high-voltage battery assemblys expansion valve limited warranty for defects in materials and/or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| M010125 | Warranty extension | May 19, 2025 | 11018555 | PDF, 261 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 1 model year this bulletin names have filed 2 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.
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 group9 other manufacturer communications filed against the MINI Countryman under the same component group (engine), newest first. The eight newest are listed; the rest are on the MINI list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| M180126 | Service bulletin | May 11, 2026 | Tarnishing of the metal (1) on the rear silencer is caused by the heating and cooling of the exhaust. |
| M280123 | Service bulletin | May 8, 2026 | A Check Control message displays for “Transmission oil service required” (ID 2120). This warning can be triggered: From 60,000 miles… |
| B061726 | Other | Feb 6, 2026 | Turbocharger Return |
| 6412900100 | Warranty extension | Aug 1, 2025 | The electric auxiliary heater assembly limited warranty for defects in materials and / or workmanship has been extended to 10 years / 120,00… |
| 6127900700 | Warranty extension | Nov 27, 2024 | The High-Voltage (HV) Battery Assembly Cell Modules Temperature Sensors (Internal NTC repair kit-specific) limited warranty for defects in m… |
| M120124 | Service bulletin | Jun 19, 2024 | Check Control message: Drive. Check as soon as possible. The emissions warning lamp (MIL) may light up and the following fault has been stor… |
| M110423 | Service bulletin | Sep 18, 2023 | The left charge air line can fail and cause an induction leak. In some cases the “Engine Malfunction”warning may illuminate. Note: This Ser… |
| SIM640122 | Service bulletin | May 1, 2022 | Mist formation on the windscreen inner surface may occur at departure or after MSA (automaticstart/stop). Acoustic abnormality in the area o… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for MINI, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is MINI 6450900300 a recall?
No. A warranty extension 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 6450900300 repair free?
A warranty extension 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 6450900300 cover?
The manufacturer filed it against 1 model year: 2023 MINI Countryman. 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: built 22 Sep 2022 – 27 Sep 2023 — the build date is on the certification label in the driver’s door jamb.