Audi A4 B7 2.0 TDI Diesel Water Hose Cooling Coolant Pipe Line 1K0122157D

Audi A4 B7 2.0 TDI Diesel Water Hose Cooling Coolant Pipe Line is a component from the Cooling system hoses and pipes group, designed for operation in the cooling system of a diesel engine. It is responsible for the stable flow of coolant, which supports a safe operating temperature for the power unit and reduces the risk of overheating.

Specifications and technical data

• SKU: 1K0122157D
• Mark: Audi
• Condition: Used
• OEM Part Number: 1K0122157D
• Substitutable numbers: 1K0122157D, 1K0 122 157 D
• Fuel type: Diesel
• Category: Coolant Hoses

Function in the diesel engine cooling system

The water hose in a Diesel engine plays a key role in the circulation of coolant between the components of the cooling system. A properly selected hose ensures:

• stable coolant flow under typical road loads,
• resistance to the elevated operating temperature of the diesel unit,
• maintenance of system tightness during pressure changes.

Thanks to its proper fit to the geometry of the engine compartment, the hose minimizes the risk of rubbing against other components and facilitates cooling system maintenance.

Purpose and fitment for Audi

The offered component has been designed for Audi vehicles, which translates into compatibility with the factory cooling system architecture. The hose design takes into account:

• routing in the engine compartment typical for models with a 2.0 TDI unit,
• appropriate internal cross-section for coolant flow,
• mounting points and shape adapted to factory brackets.

Such a fit facilitates installation without the need for modifications and allows for maintaining the factory characteristics of the cooling system.

Performance characteristics and installation

As an element from the Cooling system hoses and pipes category, the water hose is adapted to work in an environment exposed to temperature changes and contact with coolant. In practice, this means:

• the possibility of use as a replacement for a worn or leaking hose,
• restoration of proper coolant circulation after system repair,
• reduction of the risk of pressure drop in the cooling system.

The product is intended for service installation – it is recommended to install it while checking the condition of clamps, connectors, and the tightness of the entire system after replacement.

Product condition and benefits of choosing a used part

The item is offered in Used condition, which allows for economical repair while maintaining compliance with the vehicle's original specification. Choosing a used water hose is a solution that can be beneficial in the case of:

• maintenance repairs in older Audi models,
• limited budget while maintaining fitment to the factory system,
• the need for quick component replacement without waiting for rare new parts.

Before installation, a standard visual inspection and a leak test after starting the engine are recommended to confirm the proper operation of the cooling system.

Technical support and additional information

To better understand the impact of water hoses on engine safety and the symptoms of overheating, it is worth reading the guide on diagnostics and cooling system service: Engine cooling system – overheating, repair, and used radiators. The article discusses practical aspects of operation and repair that help in choosing the right service strategy.

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 hoses, return lines, or sections connecting the radiator to the engine, check the available parts in the Audi cooling system hoses and pipes category.