Audi RS4 B8 4.2 FSI CFSA Coolant Hose Pipe Line Tube 8K0819350A

Audi RS4 B8 4.2 FSI CFSA Coolant Hose Pipe Line Tube is an original cooling system component from the Cooling system pipes and hoses group, designed for the 4.2 FSI CFSA petrol engine. Engineered by the vehicle manufacturer, it ensures proper coolant flow and stable thermal conditions for the engine, which translates into safe and consistent operation of the entire system.

Specifications and technical data

• SKU: 8K0819350A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0819350A
• Substitutable numbers: 8K0819350A, 8K0 819 350 A
• Fuel type: Petrol
• Category: Coolant Hoses

Function of the coolant hose in the 4.2 FSI CFSA engine

In the 4.2 FSI CFSA petrol engine, the cooling system operates under significant thermal load, which is why a properly selected coolant hose is crucial for maintaining a stable operating temperature. The offered component is responsible for the precise routing of the cooling medium between components, reducing the risk of localized overheating, performance drops, and accelerated wear of the power unit.

Thanks to its factory geometry and fitment for the Audi cooling system, the hose maintains proper rigidity and flexibility within the typical operating temperature ranges of a petrol engine, which minimizes stress on connections and fittings and facilitates correct installation.

Benefits of using an original Audi hose

Using an original coolant hose in the Audi RS4 B8 allows for compliance with the manufacturer's factory specifications. This translates into:

• reliable fitment to the existing cooling system without the need for modifications,
• stable coolant flow parameters across the entire engine load range,
• reduced risk of leaks resulting from the poor fitment of aftermarket replacements,
• maintenance of predictable system behavior under high temperature and pressure conditions.

For high-power petrol units such as the 4.2 FSI CFSA, maintaining the factory cooling characteristics is particularly important for engine durability and performance consistency.

Performance characteristics and installation

The offered hose comes from the Cooling system pipes and hoses group, meaning it has been designed to operate in a coolant environment under variable thermal and pressure loads. The design of the hose accounts for the typical layout in the Audi RS4 B8 engine bay, which facilitates routing according to factory mounting points and limits the risk of rubbing against adjacent components.

As a used part, it allows for an economical repair of the cooling system while maintaining the manufacturer's original specifications. Before installation, a standard inspection of tightness, connection surfaces, and the general condition of the rubber or material is recommended to ensure trouble-free operation after replacement.

Importance for engine thermal safety

A functional coolant hose has a direct impact on the thermal safety of the power unit. Leaks, kinks, or deformations of the hose can lead to a drop in fluid levels, flow disturbances, and engine overheating. In the case of powerful petrol units like the 4.2 FSI CFSA, the consequences of overheating are particularly costly, which is why replacing worn hoses with components that meet factory specifications is a sensible service investment.

To deepen your knowledge about typical overheating symptoms and cooling system diagnostics, it is worth reading the article: Engine cooling system – overheating, repair, and used radiators. This will allow you to better assess the condition of the entire system and plan any additional work.

Expanding Audi cooling system service

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

For vehicles equipped with quattro drive or those intensively used in dynamic driving conditions, a properly functioning cooling system is of particular importance for the durability of the entire powertrain. Additional information on the specifics of solutions used by the manufacturer is provided in the comparative material regarding AWD systems: xDrive, 4Matic, quattro or 4Motion – AWD systems comparison.