Audi A4 B8 A5 8T Transmission Oil Cooling Pipe Hose Line Diesel 8K0317818AT

Audi A4 B8 A5 8T Transmission Oil Cooling Pipe Hose Line Diesel is an original component from the Oil coolers and hoses group, designed for the automatic transmission oil cooling system in diesel-powered vehicles. It ensures stable routing of the cooling medium between the cooler and the transmission, supporting the safe operation of the drivetrain in demanding road conditions.

Specifications and technical data

• SKU: 8K0317818AT
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0317818AT
• Substitutable numbers: 8K0317818AT, 8K0 317 818 AT
• Fuel type: Diesel
• Category: Oil Coolers & Lines

Purpose and function in the oil cooling system

The transmission oil cooling pipe in Audi A4 B8 and A5 8T models is responsible for the stable flow of transmission oil between the heat exchanger and the gearbox. A properly functioning pipe reduces the risk of oil overheating, which translates into smoother transmission operation, gear shifting precision, and the overall longevity of the drivetrain.

The component is structurally matched to the cooling system in Diesel engine versions, ensuring correct routing, appropriate internal diameter, and compatible connection ends. This fitment minimizes the risk of leaks and facilitates installation at factory mounting points.

Benefits of using an original Audi pipe

Using an original transmission oil cooling pipe in the Audi A4 B8 and A5 8T allows you to maintain system performance in accordance with the manufacturer's specifications. Key benefits include:

• Factory geometric fit – the pipe is routed according to the original path, without tension or unwanted kinks.
• Compatibility with the transmission oil cooling system in diesel versions, which supports stable transmission operating temperatures.
• Reduced risk of leaks thanks to design-compliant ends and mounting points.
• Ability to use existing brackets and clamps, which speeds up service and reduces the risk of installation errors.

Operational characteristics and installation

The transmission oil cooling pipe in this version is a used component, which in practice offers a favorable compromise between cost and the preservation of original design specifications. For workshops and individual users, this means the possibility of an economical repair of the oil cooling system while maintaining compliance with Audi's factory solutions.

When replacing the pipe, it is recommended to:

• inspect the condition of the connection ports on the oil cooler and the transmission,
• check the brackets guiding the pipe in the engine bay,
• bleed the system and check the transmission oil level after completing the work.

This approach allows you to fully utilize the potential of the part and reduce the risk of repeated interventions in the oil cooling system.

Importance for the durability of the Diesel transmission

In vehicles with a diesel engine, the thermal loads on the transmission are particularly significant, especially when driving under heavy load or on long routes. A functional transmission oil cooling pipe helps maintain a stable transmission oil temperature, which contributes to:

• reduced wear of friction elements inside the transmission,
• more predictable automatic transmission operation,
• reduced risk of overheating in both city and highway conditions.

For Audi A4 B8 and A5 8T Diesel users, this is a simple way to maintain proper drivetrain operation without the need for costly transmission repairs in the future.

Related oil cooling system components and technical knowledge

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

To better understand how thermal conditions affect the entire cooling system in a vehicle and how to wisely use pre-owned components, it is worth reading the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which discusses practical aspects of operation and the selection of cooling components in varying weather conditions.