Audi A6 C7 A7 4G8 Radiator Coolant Water Pipe Hose Line Tube Petrol 4G0122055AB

Audi A6 C7 A7 4G8 Radiator Coolant Water Pipe Hose Line Tube is an original component from the Cooling system pipes and hoses group, designed specifically for premium Audi models. This used OEM part ensures a factory-fit for the cooling system, which facilitates installation and reduces the risk of leaks in the critical coolant circuit.

Specifications and technical data

• SKU: 4G0122055AB
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0122055AB
• Substitutable numbers: 4G0122055AB, 4G0 122 055 AB
• Fuel type: Petrol
• Part type: Pipe
• Category: Coolant Hoses

Purpose and function in the cooling system

This coolant pipe operates in the circuit between the components of the petrol engine cooling system, ensuring stable fluid flow and maintaining the proper temperature of the power unit. In Audi A6 C7 and A7 4G8 vehicles, a correctly selected water pipe is crucial for:

• maintaining the optimal operating temperature of the petrol engine,
• reducing the risk of overheating in city and highway conditions,
• ensuring proper cooperation with the radiator, water pump, and other hoses,
• stable operation of the air conditioning and cabin heating system (indirectly through the fluid circuit).

Benefits of using an original Audi pipe

The original cooling system pipe for Audi has been designed for the specific geometry of the engine bay, thanks to which it maintains proper routing, bending radii, and mounting points. This translates into:

• secure fitment with connectors and housings without the need for modifications,
• reduced mechanical stress and lower risk of cracks at bends,
• proper vibration damping from the power unit,
• easier diagnostics of potential leaks in the future.

Choosing a used OEM component is often a reasonable compromise between cost and quality, especially in the case of complex cooling systems in modern Audi models.

Technical characteristics and installation

The pipe is designed for use with petrol engines, which is significant due to the specific operating temperatures and accessory configuration in these units. The pipe construction is adapted to:

• operating pressure in the petrol engine cooling system,
• continuous operation at elevated temperatures,
• contact with typical coolants used in Audi vehicles.

As a used component, the pipe is a practical solution for maintenance repairs, replacing a damaged section of the installation, or restoring efficiency after a radiator or water pump failure. Installation should be performed while maintaining the proper tightening torque for clamps and bleeding the system after filling with fresh coolant.

Operational safety and diagnostics

A functional cooling system pipe has a direct impact on engine safety. In the event of leaks or deformation, the following may occur:

• fluctuations in the power unit's operating temperature,
• loss of coolant and risk of overheating,
• increased load on other cooling system components.

Therefore, whenever working on the fluid circuit, it is worth verifying the condition of the hoses, their flexibility, outer surface, and connection points. Replacing a worn section with an original pipe intended for the Audi A6 C7 / A7 4G8 helps restore stable engine operating conditions and limit the risk of costly repairs in the future.

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 pipes, hoses, or cooling system connectors, check the available parts in the Audi cooling system pipes and hoses category.

Technical support and knowledge about the cooling system

When selecting cooling system components – especially in vehicles with extensive accessories – it is worth using reliable sources of knowledge. In our guide, we discuss how high temperatures affect the fluid circuit, what symptoms indicate cooling problems, and when it pays to reach for used components such as radiators, fans, or pipes. You can find more practical information in the article Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.

Additionally, if you are considering different service strategies and want to compare the cost-effectiveness of original, aftermarket, and used parts in the context of OEM number matching and operating costs, check out the guide Original, aftermarket, or used – which car parts are the most cost-effective?, which will help you plan your Audi repair consciously.