Audi A6 C7 A7 S7 4G Water Pipe Hose Engine Cooling Coolant Unit Line 4G0145919J

Audi A6 C7 A7 S7 4G Water Pipe Hose Engine Cooling Coolant Unit Line is an original component from the Cooling system hoses and pipes group, designed for the coolant circulation system in Audi A6, A7, and S7 C7 generation engines. Engineered by the vehicle manufacturer, it ensures proper coolant routing, flow stability, and a perfect fit with the factory mounting system in the engine bay.

Specifications and technical data

• SKU: 4G0145919J
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0145919J
• Substitutable numbers: 4G0145919J, 4G0 145 919 J
• Part type: Hose
• Category: Coolant Hoses

Purpose and function in the cooling system

The cooling hose in this model is responsible for a secure and leak-proof connection between system components, such as the engine block, radiator, or auxiliary cooling modules. A correctly selected hose:

• maintains stable coolant flow under varying engine loads,
• minimizes the risk of localized overheating in the engine area,
• provides appropriate flexibility during engine operation on engine mounts.

Thanks to its factory geometry, the hose is tailored for routing in the engine bay of the Audi A6 C7, A7, and S7, which facilitates installation and reduces stress on ports and connectors.

Original origin and fitment for Audi

The component was developed specifically for Audi vehicles, which translates into compliance with factory quality and safety standards. The original hose:

• fits factory brackets and routings in the engine bay,
• is optimized for internal diameter and wall thickness,
• is designed to operate within the typical temperature and pressure ranges of these models' cooling systems.

Such a fit reduces the risk of leaks, hose twisting, or improper positioning, which is important for both durability and service comfort.

Characteristics of the used component

The hose comes from a used vehicle, making it a cost-effective solution while maintaining the manufacturer's original specifications. The used component allows for:

• preserving the factory flow characteristics in the cooling system,
• reducing repair costs compared to a new OEM part,
• maintaining the consistency of the entire system with other factory components.

This is a practical solution for maintenance repairs, replacing a damaged hose, or restoring full cooling system efficiency after a failure.

Technical support and part selection

When selecting a cooling hose for an Audi A6 C7, A7, or S7, it is crucial to pay attention to compatibility with the specific engine version and cooling system configuration. The original hose from this series has assigned part numbers and interchangeable numbers, which facilitates compatibility verification in service catalogs and parts selection systems.

If you are planning a comprehensive repair or upgrade of your Audi's engine area and need other components from the same group, such as additional hoses, return lines, or sections connecting to the radiator, check the available parts in the Audi cooling system hoses and pipes category.

Practical knowledge about the cooling system

When replacing a cooling hose, it is worth paying attention to the general condition of the system – the tightness of connections, the condition of clamps, and the quality of the coolant itself. During high temperatures, it is particularly important to maintain the efficiency of the entire circuit to avoid engine overheating.

Additional information on the impact of temperature on cooling system operation and how to economically use used components can be found in the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.

If you want to plan your purchases of original used parts for your car more broadly and optimize the entire service process in one place, the article Comprehensive supply: From the engine to the smallest clip – how to complete used car parts in one place? may also be helpful.