BMW E81 E90 F10 F20 F30 Emission Reduction Cooling Pipe Union

The BMW E81 E90 F10 F20 F30 Water Flange Pipe is an original cooling system component from the Hoses, Pipes, and Tubes group, designed for use in selected BMW models. This used component, in red, allows for a technical restoration of the coolant circuit in accordance with factory specifications, maintaining the correct fluid flow geometry.

Specifications and technical data

• SKU: 7799853
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7799853
• Substitutable numbers: 11717799853, 7799853
• Color: Red
• Category: Hoses, Lines & Pipes

Purpose and Function of the Water Flange

The presented water flange is responsible for the stable routing of coolant within the engine's cooling system, ensuring a sealed connection between individual sections of the lines. Thanks to its precisely selected diameter and shape, the pipe maintains proper fluid flow, which contributes to uniform heat dissipation from the power unit.

The component has been designed to preserve the factory routing of the lines, which reduces the risk of incorrect placement in the engine bay and minimizes stress on adjacent components. This type of solution is particularly important in modern BMW units where the installation space is highly condensed.

Construction, Color, and Fit for BMW

The flange belongs to the Hoses, Pipes, and Tubes group, meaning it has been constructed for operation in a coolant environment and under variable working temperatures. The red color facilitates visual identification of the component in the engine bay, which is helpful during diagnostics, inspections, and subsequent service work.

As a part dedicated to BMW vehicles, the pipe is optimized for geometry and mounting points, which promotes secure seating in factory brackets and connectors. Such a fit reduces the risk of leaks, twisting of lines, or collisions with other powertrain components.

Benefits of Using a Used Original Part

Choosing a used water flange for BMW allows for the preservation of the manufacturer's original design concept while optimizing repair costs. This type of component is particularly useful for:

• locating and repairing leaks in the coolant circuit,
• restoring the factory routing of lines after previous modifications,
• servicing the cooling system after an engine failure or overheating.

By maintaining its original form and purpose, the flange supports the stable operation of the cooling system, which translates to safer thermal conditions for the engine and other cooperating components.

Professional Use in Service and Modernization

This type of water pipe is suitable for both professional BMW-specialized service centers and independent workshops performing cooling system repairs. It allows for a technically correct replacement of a damaged section of the installation without the need for universal solutions that could compromise sealing or installation ergonomics.

In the case of modernization or comprehensive cooling system service, using a dedicated water flange helps maintain consistency with other installation components, such as flexible hoses, connectors, or fluid distribution housings.

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other parts from the same group, such as additional pipes, flexible lines, or coolant hoses, check the available parts in the BMW Hoses, Pipes, and Tubes category.

For those interested in a broader context of selecting original components and the impact of design on vehicle character, an article comparing solutions used in different model generations may be helpful – find more information in the material Classic Mini vs. Modern MINI – How Design Has Changed and Which Original Mini Parts Help Preserve Their Character.