Audi A4 B8 2.0 TDI Power Steering Pump Fluid Reservoir Tank 4F0422371D

Audi A4 B8 2.0 TDI Power Steering Pump Fluid Reservoir Tank is an original hydraulic system component designed to work with the factory power steering system in Audi models. Thanks to its precise construction, it ensures stable fluid storage, proper venting, and safe supply to the power steering pump. It is a practical solution for users who want to restore the proper operation of the steering system while maintaining factory performance parameters and consistency with Audi's design.

Specifications and technical data

• SKU: 4F0422371D-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0422371D
• Substitutable numbers: 4F0422371D, 4F0 422 371 D
• Category: Power Steering Pumps

Function and role in the power steering system

The power steering fluid reservoir in the Audi A4 B8 2.0 TDI is responsible for the safe storage of the working medium and its stable supply to the pump. A properly selected component minimizes the risk of cavitation, aeration, and pressure drops in the system, which translates into:

• more predictable steering response,
• reduction of noise generated by the pump,
• limitation of wear on hydraulic components,
• maintenance of proper fluid cleanliness in the circuit. By using a solution consistent with Audi's design, the system maintains its proper operating characteristics, and the steering wheel reacts in a way consistent with the manufacturer's specifications.

Compatibility and fit for Audi

The presented reservoir has been designed for the power steering system used in the Audi A4 B8 with a 2.0 TDI engine, which means the correct placement of ports, mounting points, and the flow geometry intended by the manufacturer. Using an original Audi solution in the power steering pump supply area allows you to:

• maintain factory routing of lines and hoses,
• avoid modifications to mounts in the engine bay,
• maintain compliance with the vehicle's service documentation,
• reduce the risk of leaks resulting from improper installation. Such a fit is particularly important in modern designs, where the power steering system works with advanced safety and electronic stability control systems.

Component condition and operational aspects

Using a used, original power steering fluid reservoir is a reasonable compromise between cost and maintaining compliance with factory specifications. A component of this type allows for the restoration of proper system operation in situations such as:

• mechanical damage to the existing reservoir,
• cracks in the ports or housing,
• leaks resulting in fluid loss,
• the need for replacement after previous, improper modifications. Replacing the reservoir is often performed in parallel with servicing the power steering pump or hydraulic lines, which helps organize the entire system area and reduces the risk of recurring faults.

Benefits of using an original Audi reservoir

Choosing a solution consistent with the factory Audi design translates into a number of practical advantages. The most important include:

• consistency with the Power Steering Pump system – the reservoir works with the factory pump and lines, which facilitates installation and subsequent service,
• maintenance of the system's working capacity as intended by the manufacturer,
• proper venting and separation of air bubbles from the fluid,
• easier diagnostics of potential leaks due to maintaining the original component layout. For workshops and individual users, this means faster installation, lower risk of problems after replacement, and the ability to use service procedures provided for the factory system.

Expansion and service of the Audi power steering system

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 pressure lines, return lines, or additional hydraulic components, check the available parts in the Audi Power Steering Pumps category. When performing service work on fluid systems in a car, it is also worth taking care of the proper maintenance of other components. For a better understanding of the principles of selecting components by identification numbers and the proper operation of supply systems, it is worth reading the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses practical aspects of diagnostics and service.