Audi A6 C7 A8 D4 Gearbox Oil Pressure Line Pipe Hose 4H0317818M

Audi A6 C7 A8 D4 Gearbox Oil Pressure Line Pipe Hose is an original component from the Oil coolers and lines group, designed for the automatic transmission lubrication system in Audi vehicles. It ensures stable oil flow at the correct pressure, which translates into safe transmission operation and reduces the risk of overheating.

Specifications and technical data

• SKU: 4H0317818M
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0317818M
• Substitutable numbers: 4H0317818M, 4H0 317 818 M
• Part type: Oil Cooler Line
• Category: Oil Coolers & Lines

Purpose and function in the transmission system

The gearbox oil pressure line is responsible for transporting the lubricating and cooling medium between system components, such as the transmission housing, oil cooler, or valve body. In Audi A6 C7 and A8 D4 models, proper oil flow is crucial for:

• maintaining a stable operating temperature of the automatic transmission,
• ensuring adequate pressure in the control circuits,
• reducing wear on internal transmission components,
• maintaining smooth and refined gear shifts.

A well-chosen, original line helps avoid leaks, pressure drops, and uncontrolled oil loss, which in the long run can lead to costly repairs of the entire transmission.

Benefits of using an original Audi line

This component, designed by the vehicle manufacturer, is precisely matched to the geometry of the engine bay and transmission system in the Audi A6 C7 and A8 D4. This means:

• properly selected length and shape of the line,
• correct connection diameters and compatibility with factory fittings,
• stable oil flow even under high thermal and pressure loads.

The original line from the Oil coolers and lines category minimizes the risk of installation problems and reduces the possibility of stress or abrasion resulting from incorrect positioning in the engine bay.

Characteristics of the used component

The offered line is a used part, sourced from dismantling, which allows for an economical repair of the transmission system while maintaining factory specifications. This type of solution is particularly beneficial when:

• a quick replacement of a damaged line is necessary after a failure or leak,
• you want to reduce service costs while maintaining the original system design,
• you care about a fit consistent with the factory Audi design.

A used OEM component is a reasonable compromise between price and quality, allowing you to maintain correct transmission operating parameters without interfering with the system design.

Importance for transmission durability and oil cooling system

A functional oil pressure line has a direct impact on the lifespan of an automatic transmission. Maintaining proper oil flow:

• stabilizes the transmission operating temperature,
• ensures proper lubrication of friction elements,
• reduces the risk of overheating in urban conditions and during highway driving.

Combined with an efficient oil cooler, the line creates a cohesive system that supports trouble-free vehicle operation, especially during periods of high ambient temperatures.

Technical support and additional materials

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

To better understand how ambient temperature affects the cooling system and oil circulation in a vehicle, 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 component selection under high thermal load conditions.