Audi A7 4G Oil Pipe Line Tube Hose Automatic Gearbox Transmission 4G0317818S

Audi A7 4G Oil Pipe Line Tube Hose Automatic Gearbox Transmission is a component from the Oil coolers and lines category, responsible for the safe routing of transmission fluid in an automatic gearbox. A properly selected oil line stabilizes the operating temperature of the transmission, supports its durability, and reduces the risk of costly failures. This solution is designed for users who expect efficient, technically correct operation of the drivetrain system.

Specifications and technical data

• SKU: 4G0317818S
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0317818S
• Substitutable numbers: 4G0317818S, 4G0 317 818 S
• Gearbox type: Automatic
• Category: Engine Oil Coolers & Lines

Function of the oil line in an automatic gearbox

The oil line in the Audi A7 4G model operates in a circuit between the automatic transmission and the oil cooling system. Its task is to maintain a stable flow of lubricating and cooling medium, which translates into:

• more uniform operating temperature of the automatic transmission,
• reduction of thermal loads on internal components,
• reduced wear of clutch plates and control valves,
• more predictable system operation during dynamic driving.

Thanks to a properly functioning oil line, the automatic transmission maintains stable gear shifting characteristics, and the risk of overheating and reduced lubrication quality is significantly lower.

Purpose and fitment for Audi

The discussed line has been designed to work with the automatic gearbox in the Audi A7 4G generation. This means matched connection geometry, appropriate length, and hose diameter, which facilitates installation at factory mounting points. Using a solution consistent with the manufacturer's design reduces the risk of leaks, stress on connections, and improper routing of the line in the undercarriage compartment.

In practice, this translates into faster service installation, fewer potential points of failure, and the preservation of the original oil flow concept in the transmission cooling system.

Benefits of using an original oil line

Choosing an oil line from the Oil coolers and lines group dedicated to the Audi A7 4G allows for maintaining the consistency of the entire drivetrain system. Key advantages of such a solution include:

• preservation of factory transmission fluid flow parameters,
• better compatibility with the existing oil cooler and transmission accessories,
• reduced risk of leaks thanks to matched ends and seals,
• maintenance of stable automatic transmission operation in both urban and highway conditions.

For the user, this means more predictable transmission performance, a lower risk of overheating, and the possibility of longer transmission service life without the need for costly repairs.

Component condition and service application

The oil line is offered as a used part, which allows for an economical repair of the system while maintaining compliance with the factory Audi design. This type of component is particularly useful in situations where the existing line has suffered mechanical damage, corrosion at the connections, or shows signs of leakage under operating pressure.

Replacing the line is recommended, among other things, after detecting transmission fluid leaks, signs of abrasion on the outer surface, or after repairs involving the removal of the automatic transmission. A correctly selected component helps restore the tightness and stability of the entire system.

Technical support and additional information

When working on the transmission oil cooling system, it is worth paying attention to the general condition of the vehicle's cooling system. Issues related to the operating temperature of the power unit and the influence of radiators on component durability are discussed in more detail in the article Engine cooling system – overheating, repair, and used radiators, which helps to better understand the relationship between operating temperature and component lifespan.

If you are considering whether new or used parts are better for this type of component, a practical comparison of costs and durability can be found in the material Car parts – new or used? We compare costs, quality, and durability. This is a good addition to your knowledge when planning an automatic transmission repair.

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