Oil Pipe Audi A5 S5 8T A4 S4 B8 Automatic Gearbox Cooler Line 8K0317817DH

Oil Pipe Audi A5 S5 8T A4 S4 B8 Automatic Gearbox Cooler Line is an original component from the Oil coolers and lines group, designed specifically for use with automatic transmissions in Audi vehicles with petrol engines. It enables stable oil flow to the cooler, supporting the safe operation of the transmission in both city and highway driving conditions.

Specifications and technical data

• SKU: 8K0317817DH
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0317817DH
• Substitutable numbers: 8K0317817DH, 8K0 317 817 DH
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Oil Coolers & Lines

Purpose and function in the oil cooling system

The presented line is a component of the system responsible for transporting transmission oil to the cooler and returning it to the gearbox. In vehicles with a petrol engine and an automatic transmission, a stable oil temperature is crucial for smooth gear shifting, protection of clutches and hydraulic valves, and reducing wear on the entire transmission.

Thanks to its factory-fit design for Audi A4 / S4 B8 and A5 / S5 8T models, the line maintains the correct routing geometry, which minimizes the risk of vibrations, chafing, and leaks during long-term operation.

Benefits of using an original oil cooler line

Using an original line in the automatic transmission oil cooling system provides a number of practical benefits:

• maintenance of factory oil flow parameters and operating pressure within the transmission,
• proper connection to the oil cooler and the gearbox housing, without the need for modifications,
• reduction of the risk of oil overheating, which promotes stable automatic transmission operation,
• better consistency of system performance compared to aftermarket replacements with uncertain specifications.

For users who drive their Audi in city traffic, on highways, or while towing, a functional oil cooler line is an essential element of preventative maintenance against costly transmission repairs.

Installation characteristics and application

The line is designed for use with automatic transmissions in petrol-powered Audi vehicles. The properly shaped routing and factory connection ends facilitate installation at the original mounting points, which allows for maintaining the correct path of the line relative to the body, subframe, and other powertrain components.

In practice, this means:

• the ability to restore the factory oil cooling system configuration after a repair or collision,
• easier diagnostics of potential leaks due to the predictable routing of the line,
• compatibility with other Audi powertrain components, without the need for adaptation.

Component condition and service application

The offered line comes from the used parts group, which allows for an economical repair of the oil cooling system while maintaining the manufacturer's original specifications. This type of component is particularly useful in situations where mechanical damage to the line has occurred (e.g., after a collision, engine bay interference, or corrosion of the mounts) and a quick replacement with a part of known origin is necessary.

Due to the importance of the oil cooling system for the durability of the automatic transmission, the line should be treated as a service part that is replaced preventatively when signs of corrosion, micro-cracks, or weeping at the connections are noticed.

Expanding knowledge and selecting other components

During periods of high temperatures, it is particularly important to maintain the efficiency of the entire cooling system, including the oil cooler and associated components. To better understand the impact of temperature on the cooling system and the cost-effectiveness of using used components, it is worth reading the guide Summer heat vs. cooling system: used coolers and fans as a guarantee of savings.

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

When selecting used components for the powertrain and oil cooling system, the guide on the pitfalls of buying second-hand parts may also be helpful: Buying used car parts – the most common mistakes when choosing components for tuning and repairs.