Radiator Expansion Tank BMW X3 F25 X4 F26 Overflow Tank Bottle 7823544

Radiator Expansion Tank BMW X3 F25 X4 F26 Overflow Tank Bottle is an original cooling system component from the Expansion tanks category, designed for use in BMW vehicles. Thanks to its factory origin, it ensures proper system operating parameters, coolant pressure stabilization, and predictable performance under typical operating conditions.

Specifications and technical data

• SKU: 7823544
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7823544
• Substitutable numbers: 17138616418, 8616418, 17137639464, 7639464, 17137823544, 7823544, EM
• Category: Expansion & Overflow Tanks

Purpose and function in the cooling system

The presented expansion tank is a cooling system component responsible for compensating for fluid volume changes and maintaining the appropriate level of operating fluid. A properly selected tank helps reduce the risk of engine overheating, facilitates system bleeding, and stabilizes the operation of the entire cooling circuit.

Due to its design compliant with manufacturer standards, the tank works with factory hoses, connectors, and sensors, which promotes trouble-free installation and maintains system tightness.

Original origin and compatibility

As a BMW brand part, the tank has been designed for specific models and cooling system configurations. This means the shape, mounting points, and connections are matched to the factory solutions used in the given vehicle generation. Original origin promotes technical consistency with other components, which is important for service and diagnostics.

The element has an assigned OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific engine version and vehicle model year without the need for installation modifications.

Performance characteristics and installation

As an element from the Expansion tanks category, the product has been designed to operate under conditions of variable coolant pressure and temperature. The design provides for cooperation with the factory pressure cap as well as return and overflow hoses, which allows for maintaining stable system operating conditions.

When replacing, it is recommended to:

• check the condition of supply hoses and clamps,
• check for leaks after filling the system,
• bleed the cooling system in accordance with the service procedure for the given model.

This installation method reduces the risk of subsequent leaks and makes it easier to maintain a stable engine operating temperature.

Product condition and benefits of choosing a used OEM part

The offered tank is a used component, which allows for combining a reasonable purchase cost with maintaining the original manufacturer's specification. In many cases, a used OEM part provides better fitment and predictable behavior than cheaper replacements of inconsistent build quality.

If you want to better understand when choosing a used original element is technically justified, it is worth reading the practical tips contained in the article 5 reasons why a used OEM part is a better choice than a replacement.

Expanding the BMW cooling system

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

Summary

Radiator Expansion Tank BMW X3 F25 X4 F26 Overflow Tank Bottle is a factory cooling system component that allows for restoring proper engine operating parameters after a failure or wear of the previous tank. The original design, fitment to the installation, and the ability to verify by part numbers make it a solution that is technically consistent with the manufacturer's assumptions and convenient for service.