Audi RS4 B7 Water Pipe Engine Cooling Radiator Coolant Hose 4.2 FSI 8E2819373AB

Audi RS4 B7 Water Pipe Engine Cooling Radiator Coolant Hose is an original component designed to operate in the coolant circulation system between the engine and the radiator. Thanks to its factory geometry and precise fit for the 4.2 FSI unit, it ensures stable coolant flow and proper integration with other cooling system components in the RS4 B7.

Specifications and technical data

• SKU: RHD-8E2819373AB
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E2819373AB
• Substitutable numbers: 8E2819373AB, 8E2 819 373 AB
• Part type: Hose
• Category: Coolant Hoses

Purpose and function in the cooling system

The offered hose belongs to the Cooling system pipes and hoses category and is responsible for transporting coolant between key points in the circuit of an Audi RS4 B7 with a 4.2 FSI engine. A properly selected hose maintains system integrity, reduces the risk of engine overheating, and supports the stable operation of the thermostat and radiator.

For high-power engines such as the 4.2 FSI in the RS4 B7, correct coolant flow has a direct impact on engine durability, operating temperature stability, and operational safety under high loads.

Design and fitment for Audi RS4 B7 4.2 FSI

The hose has been specifically designed for the geometry of the RS4 B7 engine bay, taking into account routing near hot components and limited installation space. Properly shaped sections and factory-spec connector diameters allow for:

• secure seating on engine and radiator ports,
• maintaining the correct bending radius without flow restrictions,
• reduction of mechanical stress during engine operation.

As a result, the hose works with original clamps and mounts, which facilitates installation and reduces the risk of leaks over the long term.

Characteristics of the used component

The offered hose is a used component, which allows for an economical repair of the cooling system while maintaining the manufacturer's original specifications. In practice, this means the ability to restore proper coolant circulation without the need to rely on aftermarket replacements with uncertain parameters.

Choosing an original, used hose is particularly beneficial for cars like the Audi RS4 B7, where precise shape and length matching are crucial for proper routing in a cramped engine bay and for maintaining the factory mounting layout.

Benefits of using an original cooling hose

Using this hose in an Audi RS4 B7 4.2 FSI allows for:

• maintaining factory coolant flow characteristics across the entire load range,
• reducing the risk of leaks resulting from mismatched diameters or shapes,
• maintaining correct hose routing relative to exhaust manifolds and other heat sources,
• easier diagnostics and cooling system service due to compliance with manufacturer documentation.

For users operating the RS4 B7 under increased thermal loads – e.g., dynamic driving or track use – a functional cooling hose is one of the essential elements in reducing the risk of engine overheating.

High-temperature operation and service knowledge

During the summer season, the cooling system in high-power cars operates under particularly demanding conditions. It is worth taking care not only of the hoses but also the condition of the radiator and fans. More practical information on this topic can be found in the guide Summer heat vs. cooling system – how used components can support economical operation, where the impact of high temperatures on the cooling system and possibilities for cost optimization while maintaining engine safety are discussed.

If you are planning a comprehensive repair or upgrade of the cooling system area in your Audi and need other components from the same group, such as additional pipes, return hoses, or sections connecting to the radiator, check out the available parts in the Audi cooling system pipes and hoses category.