Expansion Tank BMW F45 225xe Mini F60 SE ALL4 Coolant Reservoir Bottle 7645508

Expansion Tank BMW F45 225xe Mini F60 SE ALL4 Coolant Reservoir Bottle is an original BMW cooling system component designed for hybrid and all-wheel-drive models. This used, fully functional expansion tank ensures stable operating conditions for the engine and auxiliary equipment by maintaining the correct coolant level. Thanks to its factory origin, it guarantees precise fitment to the mounts, hoses, and connectors in the engine bay.

Specifications and technical data

• SKU: 7645508
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7645508
• Substitutable numbers: 7645508, 17137645508
• Category: Expansion & Overflow Tanks

Purpose and compatibility

The presented expansion tank is designed for BMW F45 225xe and Mini F60 SE ALL4 vehicles, where the cooling system operates under increased load due to the hybrid powertrain and advanced electronics. The original design ensures:

• proper cooling system venting,
• coolant pressure stabilization,
• seamless integration with factory sensors and hoses.

This makes the expansion tank the right choice when replacing a worn or damaged component in BMW and Mini vehicles built on the same platform.

Construction and function in the cooling system

As an item in the Expansion Tanks category, this component plays a key role in maintaining a stable operating temperature for the powertrain. The tank's design enables:

• compensation for coolant thermal expansion,
• safe discharge of excess pressure,
• coolant level monitoring under varying engine loads.

Properly designed connection ports and housing shape facilitate installation in factory mounting points, which translates into stable positioning in the engine bay and no stress on the hoses.

Benefits of using an original BMW tank

Using an original BMW expansion tank in F45 225xe and Mini F60 SE ALL4 models allows you to maintain cooling system performance parameters in accordance with the manufacturer's specifications. In practice, this means:

• reduced risk of engine and component overheating,
• better temperature stability during city and highway driving,
• compatibility with factory caps, hoses, and brackets.

For users, this means trouble-free operation and a reduced risk of failures resulting from leaks or improper aftermarket replacements.

Condition and service application

The offered expansion tank is a used part, making it an attractive solution for accident repairs, cooling system maintenance, or restoring a vehicle to factory condition on a reasonable budget. It is particularly useful in situations where replacing a damaged tank body is necessary and maintaining the original manufacturer's specification is a priority.

BMW cooling system expansion – category link

If you are planning a comprehensive repair or upgrade of the cooling system area in your BMW and need other parts from the same group, such as additional tanks, mounting hardware, or covers, check out the available parts in the BMW Expansion Tanks category.

More about using used parts

If you are interested in a broader use of second-hand components in your car – not only in the cooling system area but also in the cabin – it is worth checking out our guide on interior personalization and selecting parts from the secondary market: Car interior tuning with Global Parts.