Audi A6 C7 A7 4G Water Pipe Hose Engine Cooling Coolant Line 4G0145919AC

Audi A6 C7 A7 4G Water Pipe Hose Engine Cooling Coolant Line is an original cooling system component, designed specifically for Audi A6 C7 and Audi A7 4G models. Thanks to its factory geometry and fitment for the standard system, the hose ensures stable coolant flow and helps maintain the correct engine operating temperature, which translates into its durability and operational safety.

Specifications and technical data

• SKU: 4G0145919AC-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0145919AC
• Substitutable numbers: 4G0145919AC, 4G0 145 919 AC
• Category: Coolant Hoses

Purpose and function in the cooling system

The hose belongs to the Cooling system hoses and pipes group, responsible for transporting coolant between key engine and radiator components. A properly selected cooling pipe:

• ensures a tight connection at factory mounting points,
• maintains stable fluid flow across the full range of engine loads,
• reduces the risk of engine overheating,
• supports even heat dissipation from the block and cylinder head. Thanks to a design consistent with the manufacturer's specifications, the hose works with the standard water pump, thermostat, and radiator, without the need for modifications or diameter adjustments.

Original origin and fitment for Audi

The component was designed by the Audi brand with the specific engine bay architecture of the A6 C7 and A7 4G models in mind. This means:

• factory routing of the hose in the engine bay, maintaining the required distances from hot and moving parts,
• compatibility with original clamps and mounting brackets,
• retention of proper rigidity and flexibility at bend points. Such fitment reduces stress in the cooling system and decreases the risk of leaks, which often occur with cheap replacements featuring simplified geometry.

Performance characteristics and installation benefits

As a cooling hose component, the pipe is designed to operate under demanding temperature and pressure conditions. In practice, this means:

• stable material behavior during frequent heating and cooling cycles,
• resistance to typical operational loads in Audi A6 C7 / A7 4G engines,
• the ability to be installed in place of a worn hose without interfering with other system components. For a mechanic or user, this means efficient service, predictable installation time, and a reduction in the risk of additional repairs resulting from part mismatch.

Component condition and service application

The hose comes from the used original parts market, which in practice combines factory fitment with a more cost-effective service solution. This type of component is particularly recommended when:

• the existing hose shows signs of wear, cracks, or leaks,
• it is necessary to replace the component after a cooling system failure,
• you want to avoid problems with geometry and fitment typical of the cheapest replacements. Choosing an original cooling hose allows you to maintain the integrity of the entire system and reduce the risk of secondary failures resulting from improper fluid flow.

Technical support and additional information

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 hoses, pipes, or cooling lines, check the available parts in the Audi cooling system hoses and pipes category. In case of engine overheating problems or leaks in the fluid circuit, it is worth knowing the broader context of component selection – you will find practical tips in the article Cooling system failure: why is an original used radiator a safer choice than a cheap replacement?, which discusses the impact of cooling component quality on engine durability.