Audi A4 B8 A5 8T 2.0 TDI Automatic Gearbox Oil Line Pipe 8K0317817EC 8K0317818EC

Audi A4 B8 A5 8T 2.0 TDI Automatic Gearbox Oil Line Pipe is a specialized component from the Oil coolers and lines category, designed for the automatic transmission lubrication system in Audi vehicles. It is responsible for the safe routing of transmission fluid between the gearbox and the cooling system, which is crucial for the stable operation and durability of the automatic transmission.

Specifications and technical data

• SKU: 8K0317817EC
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0317817EC
• Substitutable numbers: 8K0317817EC, 8K0 317 817 EC, 8K0317818EC, 8K0 317 818 EC
• Gearbox type: Automatic
• Part type: Oil Cooler Line
• Category: Oil Coolers & Lines

Purpose and function in the drivetrain

The automatic gearbox oil line in Audi A4 B8 and A5 8T models with a 2.0 TDI engine operates in a demanding environment of high temperature and pressure. Its task is to maintain a stable flow of transmission fluid to the oil cooler, which allows for maintaining the optimal operating temperature of the gearbox and reduces the risk of overheating during city driving, highway driving, and under increased load conditions.

A properly selected oil line supports:

• proper lubrication of the internal components of the automatic transmission,
• efficient heat dissipation to the cooling system,
• stable transmission operation during gear shifts,
• reduction of mechanical wear of components.

Benefits of using an original Audi line

Using an oil line from the same design line as factory Audi components ensures a precise fit to the cooling system and automatic transmission. This means correct connection geometry, appropriate length and diameter of the line, as well as compatibility with factory mounts and brackets on the chassis.

The main advantages of such a solution include:

• stable oil pressure throughout the entire automatic transmission cooling circuit,
• reduced risk of leaks at connections thanks to matched ends,
• easier installation without the need for system modifications,
• preservation of the factory transmission operating characteristics.

Technical characteristics and installation

The line has been designed to work with an automatic transmission, where the transmission fluid serves as both a working and cooling medium. The design of the line takes into account variable thermal and mechanical loads, typical for operation in cars with Audi drivetrains, which translates into appropriate rigidity, vibration resistance, and tightness over a long period of use.

During installation, it is important to maintain the factory routing of the line, proper seating in the brackets, and precise tightening of the connections. This allows for avoiding point stresses, abrasions, and micro-leaks that could lead to a loss of transmission fluid and a decrease in cooling efficiency.

Application in service practice

Replacing the oil line is recommended in situations where there are signs of oil leakage in the vicinity of the automatic transmission oil cooler, corrosion of the metal sections of the line, or mechanical damage resulting from a collision or interference with the drivetrain. Selecting a component from the same design group as original Audi parts allows for maintaining the consistency of the entire transmission oil cooling system.

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

Technical support and service knowledge

To better understand the role of the cooling system in protecting drivetrain components, it is worth reading our guide on the impact of high temperatures on the engine cooling system and ways to economically use used components – details can be found in the article "Summer heat vs. cooling system: used radiators and fans as a guarantee of savings".

If you are interested in a broader context of drivetrain operation in cars with advanced traction systems, including solutions used by Audi, a comparison of popular AWD drives may also be helpful, available in the material "xDrive, 4Matic, quattro or 4Motion – a comparison of AWD drives from BMW, Mercedes, Audi and VW".