Mini R50 Coolant Expansion Tank One D W17 Water Expansion Tank Bottle 7796548

Mini R50 Coolant Expansion Tank One D W17 Water Expansion Tank Bottle is an original cooling system component from the Expansion tanks group, designed for Mini brand models. This used OEM component allows for maintaining factory engine operating characteristics, coolant pressure stabilization, and safe discharge of excess fluid during operation.

Specifications and technical data

• SKU: 7796548
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7796548
• Substitutable numbers: 7796548
• Category: Expansion & Overflow Tanks

Purpose and function in the cooling system

The expansion tank in Mini R50 and R52 models is responsible for compensating for changes in coolant volume resulting from temperature fluctuations. A correctly selected tank:

• stabilizes pressure in the cooling system,
• enables safe venting of the system,
• provides a coolant reserve,
• facilitates monitoring of the working medium level.

By using an original Mini solution, compatibility with the factory system design is maintained, which reduces the risk of leaks and overheating problems of the power unit.

Technical characteristics and fitment

The presented Mini expansion tank is an OEM component, which means full compatibility with factory mounts, connector diameters, and hose routing in the engine bay. The tank construction is designed for specific models, ensuring that:

• the mounting position is consistent with the original layout under the hood,
• connections work with standard coolant hoses,
• proper circulation and return of fluid to the system are maintained.

Such a solution facilitates installation and limits the need for modifications, which is particularly important when servicing Mini vehicles, where space in the engine bay is tightly designed.

Benefits of using an original Mini tank

Choosing a used, original Mini expansion tank is a reasonable compromise between cost and quality. Key advantages include:

• factory fitment – no issues with compatibility and leaks typical of low-quality replacements,
• maintaining cooling system operating parameters – proper circulation and fluid volume compensation,
• consistency with other OEM elements – compatibility with standard hoses, clamps, and brackets.

This approach helps maintain a stable engine operating temperature, which translates into the longevity of the power unit and other components working with the cooling system.

Application in Mini service and repairs

Mini R50 Coolant Expansion Tank One D W17 Water Expansion Tank Bottle will work well both for a typical replacement of a worn-out element and for broader service work related to the cooling system – e.g., after a pump failure, radiator, or thermostat replacement. The used OEM component allows for shortening vehicle downtime in the workshop, as it does not require fitting or system modifications.

If you are planning a comprehensive repair or upgrade of the cooling system area in your Mini and need other elements from the same group, such as additional tanks, mounting elements, or compatible hoses, check the available parts in the Mini expansion tanks category.

Support in part selection and technical knowledge

When selecting used OEM components for a Mini, it is crucial to pay attention to compatibility with the specific body and engine version, as well as the technical condition of the component. In case of doubts regarding repair organization or optimal use of used parts, it is worth using expert materials – practical tips can be found in the article Availability of car parts off-the-shelf vs. repair time – how do used OEM parts shorten workshop stays?, which discusses the impact of quick availability of original components on the time and cost of service.