Audi A6 C7 A7 4G 3.0 TFSI Coolant Water Hose Pipe Line Tube 4G0819377M

Audi A6 C7 / A7 4G 3.0 TFSI Coolant Hose is an original part from the Cooling System Hoses and Pipes group, designed for 3.0 TFSI gasoline engines. It ensures stable coolant flow within the engine unit, which translates to a safe engine operating temperature and predictable performance of the entire cooling system.

Specifications and technical data

• SKU: 4G0819377M
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0819377M
• Substitutable numbers: 4G0819377M, 4G0 819 377 M
• Fuel type: Petrol
• Part type: Hose
• Category: Coolant Hoses

Purpose and Function in the Cooling System

This water hose is a component of the cooling system responsible for directing coolant between selected components of the 3.0 TFSI engine in Audi A6 C7 and Audi A7 4G models. A correctly selected and sealed hose helps maintain stable fluid circulation, reduces the risk of overheating, and supports even heat dissipation from the engine unit.

The part has been specifically designed for gasoline engines, meaning its geometry, connection diameters, and routing are adapted to the factory engine bay architecture. Proper hose routing minimizes stress, vibration, and the risk of rubbing against adjacent components.

Benefits of Using an Original Audi Hose

Using an original coolant hose for the Audi A6 C7 / A7 4G 3.0 TFSI ensures:

• factory fit for cooling system mounts and spigots,
• correct coolant flow according to manufacturer specifications,
• compatibility with other system components such as the radiator, water pump, or thermostat,
• reduced risk of leaks due to improper shape or diameter fit.

As a result, the hose supports stable cooling system operation, which directly impacts engine durability, smooth running, and operational safety across a wide range of loads and temperatures.

Installation and Operational Characteristics

The hose is designed for installation in place of the original part, without requiring vehicle modifications. The appropriately shaped pipe allows for correct routing within the engine bay, maintaining required distances from hot and moving components.

When replacing, it is recommended to:

• check the condition of other cooling system hoses,
• verify the tightness of connections after filling the system,
• bleed the system according to the service procedure for the specific model.

This approach allows for full utilization of the factory cooling system design potential and reduces the risk of recurring service interventions in the short term.

Significance for the 3.0 TFSI (Gasoline) Engine

3.0 TFSI gasoline engines operate under significant thermal load, making an efficient cooling system crucial for their longevity. A properly selected water hose:

• supports maintaining optimal operating temperature across the entire RPM range,
• helps reduce the risk of localized overheating in the block and cylinder heads,
• ensures predictable engine behavior in urban and highway conditions.

For drivers who operate their Audi dynamically or on long journeys, a functional coolant hose is one of the elements contributing to the trouble-free operation of the engine unit.

Expanding Knowledge on the Cooling System

To better understand the impact of hoses and pipes on engine durability and signs of overheating, it is worth reading the guide on our blog: Engine Cooling System – Overheating, Repair, and Used Radiators. The article discusses practical aspects of diagnosing and servicing cooling systems in popular models.

Related Audi Cooling System Components

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other parts from the same group, such as additional hoses, pipes, or coolant conduits, check the available parts in the Audi Cooling System Hoses and Pipes category.