Audi A5 S5 8T A6 S6 4F Crankcase Ventilation Hose Tube Line Pipe 079103209AK

Audi A5 S5 8T A6 S6 4F Crankcase Ventilation Hose Tube Line Pipe is an original component from the Lines, hoses and pipes group, designed for the crankcase ventilation system in Audi engines. It ensures controlled discharge of gases from the crankcase, which promotes stable engine operation and reduces the risk of unwanted leaks or performance drops.

Specifications and technical data

• SKU: 079103209AK
• Mark: Audi
• Condition: Used
• OEM Part Number: 079103209AK
• Substitutable numbers: 079103209AK, 079 103 209 AK
• Category: Hoses, Lines & Pipes

Purpose and function of the crankcase ventilation hose

The presented hose is responsible for transporting gases from the crankcase area to the intake system, where they are re-combusted. A properly selected and airtight component of this type:

• stabilizes pressure in the crankcase,
• limits oil blow-by into the engine compartment,
• supports smooth engine operation under various loads,
• helps maintain cleanliness in the engine compartment and the intake system.

Thanks to its precise geometry and factory-standard connector diameters, the hose works with original connections, which facilitates installation and reduces the risk of leaks.

Advantages of using an original Audi hose

Choosing an original crankcase ventilation hose for Audi A5 / S5 8T and A6 / S6 4F models is a beneficial solution both technically and operationally. The component ensures:

• factory fitment for the ventilation system in a given engine type,
• compliance with Audi engine operating parameters,
• appropriate material resistance to temperature and contact with oil vapors,
• consistency with other intake system components.

Such a solution minimizes the risk of problems typical for aftermarket replacements with imprecise dimensions, such as installation difficulties or accelerated material aging.

Condition of the component and installation aspects

The offered hose comes from disassembly and is a used product, which allows for an economical repair of the ventilation system while maintaining the manufacturer's original specifications. Before installation, a standard visual inspection for any signs of wear is recommended to ensure full system tightness.

In most cases, installing the hose does not require structural modifications – the line is designed to fit factory mounts and connectors, which makes the mechanic's work easier and shortens service time.

Optimizing the Audi ventilation system

A functional crankcase ventilation hose has a direct impact on engine refinement, oil consumption levels, and the cleanliness of the intake system. Replacing a worn component with an original Audi part helps to:

• reduce the risk of oil leaks in the area of the valve cover and lines,
• decrease carbon deposit buildup in the intake manifold,
• maintain stable engine performance over a long period of operation.

For users who care about the technical condition of their engine, this is a practical way to restore the proper operation of the ventilation system without interfering with the engine's construction.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as vacuum lines, breather hoses, or intake pipes, check out the available parts in the Audi lines, hoses and pipes category.