Audi A6 C7 Coolant Hose Flange Coupler Water Pipe 2.0 TDI Diesel CNHA 8K0122293F

Audi A6 C7 Coolant Hose Flange Coupler Water Pipe 2.0 TDI Diesel CNHA is an original cooling system component from the Cooling system hoses and pipes group, designed for diesel engines. The precise geometry of the flange ensures a leak-proof flow of coolant and a stable connection with other system components.

Specifications and technical data

• SKU: 4G0121055M
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0121055M
• Substitutable numbers: 4G0121055M, 4G0 121 055 M, 8K0122293F, 8K0 122 293 F
• Fuel type: Diesel
• Part type: Fitting
• Category: Coolant Hoses

Function of the coolant hose flange in a diesel engine

The coolant hose flange in 2.0 TDI units is responsible for a stable, leak-proof connection between the hoses and the engine block or other cooling system components. A properly selected component reduces the risk of fluid leaks, pressure drops, and localized overheating, which directly impacts the durability of the power unit. In diesel engines, the cooling system operates under significant thermal load, which is why the correct flange is essential for maintaining a stable operating temperature, proper thermostat function, and even distribution of fluid throughout the block and cylinder head.

Construction and fitment for Audi A6 C7

Audi A6 C7 Coolant Hose Flange Coupler Water Pipe 2.0 TDI Diesel CNHA has been designed as an OEM component, ensuring it retains factory mounting points and a shape tailored to the engine bay space. This facilitates installation and allows for maintaining the original routing of cooling hoses without the need for modifications. The flange works with both flexible hoses and rigid cooling system components, creating a stable connection node. Properly shaped connectors minimize stress on the hoses, which reduces the risk of cracking during operation in variable thermal conditions.

Benefits of using an original Audi component

Using an original flange in the cooling system provides a number of practical benefits:

• preservation of the factory coolant flow geometry,
• secure, leak-proof connection with system hoses and housings,
• compatibility with 2.0 TDI Diesel engine accessories,
• reduction of overheating risks resulting from leaks or improper fitment. As a result, the flange is a safe choice when replacing worn or damaged parts, allowing for the restoration of proper coolant circulation in the power unit.

Condition of the component and service application

The offered flange comes from dismantling and is a used part, making it an attractive service solution for users looking for original parts at a reasonable price. It is suitable for both standard replacement of worn components and repairs following cooling system failures, such as leaks or localized overheating. Before installation, it is recommended to inspect the mating hoses, clamps, and other system elements to fully utilize the potential of the newly installed flange and avoid the recurrence of the fault.

Cooling system expansion and supporting materials

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional hose sections, connectors, or fluid distributors, check the available parts in the Audi cooling system hoses and pipes category. To better understand the impact of a functional flange and hoses on the durability of the power unit and the symptoms of overheating, it is worth reading the technical guide Engine cooling system – overheating, repair, and used radiators, which discusses practical aspects of diagnostics and service for cooling systems in modern cars.