Audi A8 D4 Radiator Coolant Feed Hose Water Pipe Line 3.0 TDI 4H2819372H

Audi A8 D4 Radiator Coolant Feed Hose Water Pipe Line is an original cooling system component designed for precise coolant routing within the engine. Thanks to its factory-spec geometry and perfect fit for the specific model version, it ensures stable thermal conditions for the power unit and proper interaction with other cooling system components. This used OEM part provides a practical and cost-effective solution for service repairs and replacements of damaged hoses.

Specifications and technical data

• SKU: RHD-4H2819372H
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H2819372H
• Substitutable numbers: 4H2819372H, 4H2 819 372 H
• Category: Coolant Hoses

Purpose and function in the cooling system

This hose belongs to the Cooling system hoses and pipes category and is responsible for the directional flow of coolant between system components in the Audi A8 D4 generation with a 3.0 TDI engine. A correctly selected hose:

• maintains the tightness of the coolant circuit under varying pressure and temperature,
• ensures proper medium flow, reducing the risk of localized overheating,
• minimizes mechanical stress thanks to its tailored length and shape.

The original design of the hose is optimized for the engine bay space of the Audi A8 D4, which facilitates installation and reduces the risk of interference with other components.

Benefits of using an original Audi hose

Using a factory coolant hose in the Audi A8 D4 3.0 TDI allows you to maintain cooling system performance in accordance with the manufacturer's specifications. Key advantages include:

• Factory fit – maintaining the original routing path without the need for modifications or adjustments required by aftermarket replacements.
• Consistency with other cooling system elements – the hose works seamlessly with factory connectors, couplings, and mounts.
• Stable engine operation – proper coolant flow supports maintaining the optimal operating temperature of the 3.0 TDI unit.

For Audi owners, it is particularly important that the original cooling system hose reduces the risk of leaks resulting from poor fitment, which is common with parts featuring universal geometry.

Characteristics of the used component

The offered hose is a used part, which allows for reduced repair costs while maintaining the OEM design. This type of part is a good choice in situations where:

• mechanical damage to the existing hose has occurred (cracks, abrasion, broken connector),
• a quick replacement is necessary while maintaining the original specification,
• compatibility with the factory mounting and routing system is a priority.

The hose can be included in the standard cooling system service procedure, which includes leak testing, bleeding, and verifying engine operating temperature after installation.

Technical support and part selection

The component has a dedicated OEM part number and interchangeable numbers, which facilitates clear identification and selection for the specific configuration of the Audi A8 D4 3.0 TDI. In case of any doubts regarding fitment, it is worth comparing the shape, mounting points, and connection diameters with the hose currently installed in the vehicle.

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

More about cooling system diagnostics

A properly functioning coolant hose is just one element of the entire system responsible for engine operating temperature. To better understand the symptoms of overheating, diagnostic principles, and the impact of individual components on engine durability, it is worth reading the guide: Engine cooling system – overheating, repair, and used radiators. This will help you plan the full scope of service work for your car and consciously select further cooling system components.