Audi Seat Skoda Volkswagen Water Return Coolant Pipe Hose Line 1K0122073B

Audi Seat Skoda Volkswagen Water Return Coolant Pipe Hose Line is a component from the Cooling system pipes and hoses group, designed for operation within the coolant circuit of VAG group vehicles. It enables a stable return of the coolant, supporting the correct operating temperature of the engine and reducing the risk of overheating the power unit. This is a solution for users looking for a proven component with factory geometry while maintaining favorable service costs.

Specifications and technical data

• SKU: 1K0122073B
• Mark: Audi
• Condition: Used
• OEM Part Number: 1K0122073B
• Substitutable numbers: 1K0122073B, 1K0 122 073 B
• Category: Coolant Hoses

Function in the cooling system

The coolant return pipe is responsible for discharging the coolant back into the circuit after it has passed through heat-absorbing components, such as the radiator or heater core. A correctly selected and leak-free pipe:

• ensures stable coolant flow across the entire engine load range,
• reduces pressure drops in the cooling system,
• minimizes the risk of leaks and air pockets in the circuit,
• supports the maintenance of the optimal operating temperature of the power unit.

Thanks to the preservation of the factory shape and connection diameters, the pipe works with other cooling system components without the need for modifications.

Benefits of using an original pipe

Using a return pipe dedicated to Audi, Seat, Skoda, and Volkswagen vehicles allows for maintaining the structural integrity of the cooling system. The properly selected flexibility and geometry of the pipe translate into:

• secure fitment to connectors and mounting brackets,
• stable routing of the pipe in the engine bay without tension,
• reduced risk of abrasion and mechanical damage during operation.

For workshops and users, this means easier installation and a lower risk of operational issues after repair. In combination with a properly functioning water pump and radiator, the pipe helps maintain predictable performance parameters of the entire system.

Characteristics of the used component

The offered pipe comes from disassembly and has the status of a used component, which allows for significantly lowering repair costs compared to a new part. This type of solution is particularly beneficial for:

• repairs of vehicles used intensively,
• servicing fleet vehicles where maintenance economy is a priority,
• restoring the efficiency of older VAG group models.

Choosing a used coolant return pipe is a compromise between price and maintaining the factory design of the part, which is essential for long-term tightness and proper system operation.

Technical support and component selection

To correctly select the pipe for a specific Audi, Seat, Skoda, or Volkswagen model, it is worth verifying compatibility with the OEM part number and interchangeable numbers visible in the technical specification. This facilitates identification and minimizes the risk of installing an incorrect component in the cooling system.

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 pipes, hoses, or coolant return sections, check the available parts in the Audi cooling system pipes and hoses category.

Thermal safety and service knowledge

A functional coolant return pipe has a direct impact on the thermal safety of the engine, which is why it is worth performing a leak and condition check of flexible components whenever interfering with the coolant circuit. To better understand the relationship between cooling system design and engine durability, it is worth consulting our guide: Engine cooling system – overheating, repair, and used radiators. This makes it easier to plan service in a way that reduces the risk of overheating and costly failures.