Audi A4 B8 Gearbox Oil Pressure Oil Cooling Line Hose Tube Pipe 8K0317817BM

Audi A4 B8 Gearbox Oil Pressure Oil Cooling Line Hose Tube Pipe is an original component from the Oil coolers and lines group, designed for the lubrication system of automatic or automated transmissions in Audi vehicles. The precisely selected geometry of the line ensures stable transmission oil flow, which translates into safe gearbox operation and reduces the risk of overheating. This is a solution for users who expect factory-fit and predictable performance parameters of the drivetrain system.

Specifications and technical data

• SKU: 8K0317817BM
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0317817BM
• Substitutable numbers: 8K0317817BM, 8K0 317 817 BM, 8K0 317 817 CS, 8K0317817CS
• Part type: Oil Cooler Line
• Category: Oil Coolers & Lines

Function of the gearbox oil line

The oil line in the Audi A4 B8 is responsible for transporting transmission oil between the gearbox and the oil cooling system components. Proper flow of the operating medium:

• stabilizes the transmission operating temperature,
• reduces mechanical wear of internal components,
• supports the maintenance of proper pressure in the oil circuit,
• reduces the risk of failures resulting from overheating or insufficient lubrication.

By maintaining the factory internal diameter and the appropriate shape, the line does not cause unwanted pressure drops, which promotes stable gearbox operation under various operating conditions.

Construction and fitment to the oil cooling system

The component belongs to the Oil coolers and lines group, meaning it works in conjunction with the gearbox oil cooler and other lines in the circuit. The design of the line is prepared for installation at factory mounting points, which facilitates maintaining:

• proper routing of the oil line in the engine bay,
• safe distances from hot and moving components,
• appropriate flexibility during drivetrain operation under load.

Such fitment reduces stress on connections and minimizes the risk of leaks, which is particularly important in systems operating under pressure.

Application in service and diagnostics

Replacement of the gearbox oil line is recommended, among other things, when leaks, corrosion of connections, or mechanical damage to the coating are detected. Using an original Audi component allows you to:

• maintain compliance with the factory oil cooling system specification,
• reduce fitting time during installation,
• preserve predictable transmission oil flow parameters.

For workshops specializing in the Audi brand, this is a solution that facilitates repairs in accordance with the manufacturer's documentation and supports repeatable service quality.

Product condition and benefits of choosing a used part

The offered line is in used condition, which allows for an economical repair while maintaining the original design of the component. For many users, this is a reasonable compromise between cost and quality, especially in the case of vehicles used intensively or with higher mileage. A used OEM component retains factory mounting points and geometry, which facilitates installation without the need for system modifications.

Expansion of the oil cooling system in Audi

If you are planning a comprehensive repair or upgrade of the oil cooling system area in your Audi and need other components from the same group, such as additional oil lines, connectors, or gearbox oil coolers, check the available parts in the Audi oil coolers and lines category.

To better understand the impact of an efficient oil and coolant circuit on the durability of the power unit and transmission, it is worth reading the technical guide on our blog: Engine cooling system – overheating, repair, and used radiators. You will find practical tips regarding overheating diagnostics and the importance of oil coolers in modern designs.