Audi A5 S5 8T A4 S4 B8 Oil Pipes Automatic Gearbox Cooler Lines 8K0317817DH

Audi A5 8T A4 B8 Automatic Transmission Oil Lines are a component from the Oil Coolers and Lines group, designed for the gearbox lubrication system in Audi vehicles with automatic transmissions. They are responsible for safely routing transmission oil between the gearbox and the cooler, supporting stable operating temperatures and component longevity. This solution is dedicated to gasoline engines, designed for specific A4 B8 and A5 8T models.

Specifications and technical data

• SKU: 8K0317817DH-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0317817DH
• Substitutable numbers: 8K0317817DH, 8K0 317 817 DH
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Oil Cooler Hose
• Category: Oil Coolers & Lines

Purpose and Function in the Drivetrain

The automatic transmission oil lines in the Audi A4 B8 and A5 8T form an essential part of the transmission oil circuit, working in conjunction with the oil cooler. Their task is to maintain stable thermal conditions within the transmission, which is particularly important in vehicles with an automatic transmission operating in city traffic and under higher loads. Properly functioning lines reduce the risk of oil overheating, lubrication quality degradation, and accelerated wear of internal gearbox components.

Compatibility with Gasoline Engines and Automatic Transmissions

The presented set of lines has been prepared for compatibility with gasoline fuel type engines and the automatic transmission used in the Audi A4 B8 generation and Audi A5 8T. This ensures compliance with factory oil line routing, mounting points, and oil flow characteristics. Such a precise fit facilitates installation and helps maintain operating parameters close to factory solutions.

Technical Characteristics and Benefits of Use

Oil lines in this group are designed for operation at elevated temperatures and under the working pressures typical for automatic transmissions. The appropriately selected inner diameter and oil flow geometry support:

• stable oil flow between the gearbox and the cooler,
• maintenance of the transmission's proper operating temperature,
• reduction of pressure drops in the lubrication system,
• preservation of smooth automatic transmission operation during gear changes.

For the user, this translates to more predictable gearbox performance, especially during dynamic driving and under high thermal load conditions. Replacing worn or leaking lines with a functional component from the same design group helps restore proper oil circulation and reduce the risk of costly failures.

Component Condition and Service Application

The offered set of lines comes from the Oil Coolers and Lines category and is intended for service applications in Audi A4 B8 and A5 8T vehicles with automatic transmissions. It is suitable for replacing damaged lines after an oil leak, as well as for comprehensive maintenance of the transmission oil cooling system, e.g., after gearbox overheating or during planned preventative replacement of associated components.

Technical Support and Additional Materials

To better understand the impact of the cooling system on drivetrain durability and the importance of functional oil lines, it is worth reviewing the guide: Engine Cooling System – Overheating, Repair, and Used Coolers. The article discusses the relationships between engine operating temperature and the lifespan of key components, helping to plan maintenance services consciously.

If you are planning a comprehensive repair or upgrade of the oil cooling system in your Audi and need other parts from the same group, such as oil lines, oil coolers, or oil line connectors, check the available parts in the Audi Oil Coolers and Lines category.