Mini Cooper One R55 R56 R57 R59 R60 R61 F55 F56 Cover Lid Expansion Tank

The Mini Cooper R55 R56 R57 R59 R60 R61 F55 F56 Expansion Tank Cap is an original cooling system component from the expansion tanks category, designed for a wide range of Mini models. This used, black cap ensures the correct technical closure of the expansion tank, providing stable operating conditions for the engine's cooling system.

Specifications and technical data

• SKU: 7639024-1
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7639024
• Substitutable numbers: 17117639024, 7639024, 17132754264, 2754264, 5A1BD89, 17135A1BD89, 7135189
• Color: Black
• Category: Expansion & Overflow Tanks

Purpose and Compatibility

The presented expansion tank cap is dedicated to Mini vehicles of the R and F series, including, but not limited to, estate, hatchback, and convertible body styles. By using a solution compliant with factory Mini standards, the part maintains a proper fit to the expansion tank's thread and seat, which reduces the risk of leaks and improper cooling system operation.

A properly selected cap is crucial for maintaining the correct pressure in the cooling system, which translates to stable engine operating temperature and reduced load on other components.

Construction and Technical Specifications

The cap is made in a uniform black color, which facilitates aesthetic integration with the engine bay and other accessories. The design intended for Mini expansion tanks ensures:

• secure seating on the tank neck,
• a sealed closure of the cooling system,
• stable operating parameters under typical usage conditions.

By maintaining factory geometry and appropriate sealing characteristics, the cap supports proper coolant circulation and reduces the risk of uncontrolled fluid loss.

Condition and Service Application

This product comes from the group of used parts, making it an attractive service solution for situations where a quick and economical replacement of a damaged or worn expansion tank cap is necessary. This type of part is particularly useful for:

• cooling system repairs after engine overheating,
• addressing leaks around the expansion tank,
• preventive replacement of wear parts in older Mini models.

Using an original cap from the same category as the factory component helps maintain the structural integrity of the cooling system and reduces the risk of problems arising from the use of random aftermarket alternatives.

Benefits of Using an Original Mini Expansion Tank Cap

Choosing a part like the Mini Cooper R55 R56 R57 R59 R60 R61 F55 F56 Expansion Tank Cap offers primarily:

• compatibility with the expansion tank design – matching thread, diameter, and seal shape,
• maintenance of correct operating pressure in the cooling system,
• reduction of coolant leak risk,
• easy installation and removal during service operations.

For Mini owners who wish to maintain cooling system operating parameters as close to factory as possible, using an original cap is a technically sound and practical solution.

Other Mini Expansion Tanks and Service Knowledge

If you are looking for other Mini expansion tanks compatible with various engine and body versions, check out the Mini expansion tanks available in our store to find the right part for your specific model.

When planning more extensive service work, it is also worth expanding your knowledge about common issues with BMW/Mini engines – the article BMW E90 Engine Failures: Find Out What Can Ruin Your Budget! may be helpful, as it illustrates how proper diagnostics and prevention impact operating costs.