Audi A4 B8 A5 8T Power Steering Oil Cooler Pipe Hose Line Diesel 8K0422887AH

Audi A4 B8 A5 8T Power Steering Oil Cooler Pipe Hose Line is an original component from the Power steering pumps group, designed for operation in vehicles with a diesel engine. It ensures stable flow of the working fluid in the system, which translates into predictable steering response and safe vehicle handling.

Specifications and technical data

• SKU: 8K0422887AH
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0422887AH
• Substitutable numbers: 8K0422887AH, 8K0 422 887 AH
• Fuel type: Diesel
• Category: Power Steering Pumps

Purpose and function in the steering system

The power steering hose in Audi A4 B8 and A5 8T models is responsible for transporting hydraulic medium between system components, working in conjunction with the power steering pump, steering gear, and reservoir. A properly selected hose minimizes pressure drops, reduces the risk of cavitation, and supports the uniform operation of the entire system, which is particularly important in Diesel engine cars that generate higher operational loads.

The original geometry and internal diameter of the hose allow for maintaining factory operating parameters of the system without the need to modify other components. As a result, replacing a worn or leaking hose with this element restores stable power steering and reduces noise caused by aeration or insufficient fluid flow.

Benefits of using an original Audi hose

Using an original power steering hose in the Audi A4 B8 and A5 8T ensures:

• factory fitment to the steering system without the need for mounting modifications,
• adequate resistance to operating pressure and fluid temperature,
• maintenance of proper hose flexibility, reducing vibration transfer to the body,
• consistency with other power steering system components, which facilitates diagnostics and service.

Thanks to this solution, it is possible to restore proper steering operation in a controlled manner, which translates into confident vehicle handling and predictable steering behavior during parking maneuvers and high-speed driving.

Installation and operational characteristics

The hose has been designed for direct installation in the power steering system, maintaining the original routing in the engine bay. The appropriately selected length and shape minimize the risk of chafing against body elements or engine accessories, which is especially important in diesel units where installation space is more limited.

When replacing the hose, it is recommended to:

• check the condition of other sections of the hydraulic system,
• replace or filter the power steering fluid according to the vehicle manufacturer's recommendations,
• thoroughly bleed the system after installation to avoid the pump running "dry".

Such service actions extend the service life of the power steering pump and steering gear, and also reduce the risk of recurring leaks.

Part condition and application in Diesel engine vehicles

The offered element comes from the group of original Audi components and is classified as a used part. This means that the hose has been previously used but retains parameters allowing for further use after proper installation. For many users, this is a reasonable compromise between repair costs and maintaining factory build quality.

In vehicles with a diesel engine, the resistance of hoses to long-term thermal and mechanical loads is particularly important. The power steering hose dedicated to Diesel units has been designed with these operating conditions in mind, which promotes pressure stability in the system and reduces the risk of sudden failures during intensive use.

Steering system expansion and part selection

If you are planning a comprehensive repair or upgrade of the steering system area in your Audi and need other elements from the same group, such as return lines, high-pressure hoses, or pump supply components, check the available parts in the Audi Power steering pumps category.

When selecting components for vehicles with a diesel engine, it is worth paying attention to compatibility with the fuel type designation and hydraulic system parameters. Additional tips regarding diagnostics and selection of diesel engine supply elements, including pumps and accessories, can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which organizes key service information and helps avoid common operational errors.