Audi A4 B8 2.0 TDI CNHC Engine Water Coolant Hose Pipe Line 8K0145919C

Audi A4 B8 2.0 TDI CNHC Engine Water Coolant Hose Pipe Line is an original cooling system component from the Cooling system hoses and pipes group, designed for precise coolant routing in the engine bay. This used OEM part ensures factory-spec geometry, correct connector diameters, and perfect fitment to mounting points, which facilitates installation and reduces the risk of leaks.

Specifications and technical data

• SKU: 8K0145919C
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0145919C
• Substitutable numbers: 8K0145919C, 8K0 145 919 C
• Fuel type: Petrol
• Category: Coolant Hoses

Function and role in the cooling system

The water coolant hose in the Audi A4 B8 with the 2.0 TDI CNHC engine is responsible for the stable routing of coolant between system components, such as the engine block, radiator, or auxiliary units. A correctly selected hose:

• maintains the tightness of the coolant circuit under typical thermal loads of the power unit,
• ensures proper medium flow, which translates into uniform heat dissipation,
• minimizes the risk of engine overheating in both city and highway driving conditions.

By maintaining the factory design of the hose, the cooling system operates under stable conditions, and the engine's operating temperature remains within a safe range.

Construction and fitment for Audi A4 B8

The hose has been designed specifically for the engine bay architecture of the Audi A4 B8, taking into account the placement of connectors, brackets, and adjacent components. This means:

• a properly contoured hose path that does not interfere with other components,
• maintenance of the correct bending radius, which limits the risk of kinks and flow restriction,
• compatibility with original factory clamps and mounts.

Such fitment facilitates installation and maintenance, and also helps keep the engine bay organized, which is important for both cooling efficiency and future diagnostics.

Benefits of using an original water hose

Using an original water hose in an Audi offers a number of practical advantages:

• Factory geometry – maintaining the cross-sections and lengths designed by the manufacturer supports the proper operation of the coolant pump.
• Thermal stability – the hose is adapted to the typical operating temperatures of the power unit, which limits the risk of deformation under long-term load.
• Cooling system consistency – the component comes from the same design group as other parts, allowing it to work with them in a predictable manner.

For the user, this means more predictable cooling system behavior and a lower risk of failures resulting from mismatched aftermarket replacements.

Selecting parts by OEM number and fuel type

When selecting a water hose for an Audi A4 B8, it is crucial to consider the engine type and the OEM number. Proper fitment helps avoid problems with installation, leaks, or incorrect hose routing in the engine bay. It is worth noting that the presented element is assigned to a specific fuel type, which further narrows down the group of compatible configurations.

If you want to streamline the process of selecting parts by OEM number or VIN and avoid ordering mistakes, use the practical tips included in the guide how to select the right car part by VIN and OEM number.

Cooling system service expansion and additional resources

When working on the cooling system, it is worth thinking about it holistically – it includes not only hoses but also the radiator, fans, expansion tank, or thermostat. High ambient temperatures put extra strain on this area of the vehicle, so regular inspection of flexible elements and replacement of worn components has a direct impact on engine durability.

To better understand how summer conditions affect the coolant circuit and when it is worth considering replacing used components, read the article Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.

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