Audi RS4 B8 Oil Sump Vent Hose Sealing Flange Left N/S 079103209CB

Audi RS4 B8 Oil Sump Vent Hose Sealing Flange Left N/S is an original crankcase ventilation system component, designed to operate in the demanding engine environment of Audi models. Thanks to its factory geometry and precise fitment for the specific engine configuration, this hose ensures stable oil vapor discharge and proper crankcase ventilation. It is a practical solution for users who want to restore the correct operation of the lubrication system using a proven, used OEM part.

Specifications and technical data

• SKU: 079103209CB
• Mark: Audi
• Condition: Used
• OEM Part Number: 079103209CB
• Substitutable numbers: 079103209CB, 079 103 209 CB
• Location on the vehicle: Left
• Part type: Oil Sump
• Category: Oil Sumps

Purpose and technical function

Audi RS4 B8 Oil Sump Vent Hose Sealing Flange Left N/S operates within the lubrication system, responsible for the controlled discharge of gases and oil vapors from the engine. A correctly selected hose in this area limits the risk of overpressure in the crankcase, oil leaks, and unstable engine operation. The component was designed specifically for Audi construction, which translates into proper hose routing, maintenance of clearances, and safe avoidance of hot and moving engine parts.

The placement on the left side of the vehicle allows for precise alignment with factory brackets and connectors, without the need for installation modifications. As a result, the assembly process is orderly, and the lubrication system maintains the parameters specified by the manufacturer.

Construction and fitment to the lubrication system

The hose belongs to a group of components working with Oil Sumps, where maintaining tightness and proper vapor flow is crucial. The design of the hose is adapted to operate at elevated temperatures and in contact with oil mist, which is significant for durability and stability of operating parameters. The profile of the hose has been developed to:

• ensure the correct direction of gas flow from the lubrication system,
• minimize the risk of kinks and cross-section restrictions,
• maintain a safe distance from critical engine components.

Thanks to its factory origin, the hose maintains compatibility with original connectors, which facilitates installation and reduces the risk of connection leaks.

Characteristics of the used Audi part

The offered hose comes from the Audi brand and is a used component, which represents a reasonable compromise between cost and maintaining the original specification. A used OEM part usually fits into the existing system better than replacements with universal geometry, especially in such a demanding area as engine ventilation. This is a solution for users who want to maintain the structural integrity of the vehicle and avoid problems resulting from inaccurate hose fitment.

Choosing an original, used component is often preferred in higher-performance vehicles, where the stability of engine operating parameters has a direct impact on driving quality and engine durability.

Benefits of using the original vent hose

Using this hose in the Audi RS4 B8 lubrication system allows for the preservation of factory design assumptions. The most important advantages include:

• Proper geometry – the hose is routed according to the manufacturer's design, which limits stress and the risk of abrasion.
• Compatibility with the ventilation system – the hose works with factory connectors and lubrication system components.
• Stable ventilation – proper oil vapor flow promotes the maintenance of smooth engine operation.

A system configured in this way reduces the probability of unwanted symptoms, such as excessive exhaust smoke or oil leaks in the seal area.

Expansion of the Audi lubrication system – Oil Sumps

If you are planning a comprehensive repair or upgrade of the lubrication system area in your Audi and need other components from the same group, such as additional ventilation hoses, mounting elements, or seals working with the oil sump, check the available parts in the Audi Oil Sumps category.

More about used car parts

If you want to better understand how to consciously choose used lubrication system components and other parts, it is worth familiarizing yourself with reliable information on this topic – the article Used car parts: Myths and facts you need to know will be helpful, as it clarifies the most common doubts related to such products.