Audi A6 C6 FL Power Steering Pump Fluid Reservoir Tank 4F0422371E

Audi A6 C6 FL Power Steering Pump Fluid Reservoir Tank is an original component from the Power steering pumps group, designed for the steering system of the Audi A6 C6 generation facelift models. It ensures stable fluid storage, proper venting, and safe supply to the power steering pump, which translates into precise vehicle handling and maneuvering comfort.

Specifications and technical data

• SKU: 4F0422371E
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0422371E
• Substitutable numbers: 4F0422371E, 4F0 422 371 E
• Category: Power Steering Pumps

Function and role in the steering system

The presented power steering fluid reservoir is responsible for maintaining the correct amount of working medium in the steering system, pressure stabilization, and filtration of mechanical impurities. A properly selected and leak-free reservoir reduces the risk of air entering the lines, pump noise, and a drop in steering efficiency during dynamic driving or low-speed maneuvering.

In practice, this translates into:

• more predictable steering system operation,
• reduced load on the power steering pump,
• reduced risk of fluid leaks in the engine bay.

Original origin and fitment for Audi

As an Audi brand component, the reservoir has been designed for specific structural solutions used in the A6 C6 FL. This means factory-perfect fitment to brackets, hoses, and engine bay geometry, without the need for modifications or additional adapters. The original design ensures compliance with the power steering pump's operating parameters and the fluid flow specified by the manufacturer.

Thanks to this, installation is straightforward, and the risk of compatibility issues is significantly lower than with randomly selected aftermarket replacements.

Condition, purpose, and service application

The offered reservoir is a secondary market component, which allows for an economical repair of the power steering system while maintaining the manufacturer's original specifications. It is particularly useful in situations where the existing reservoir shows signs of wear, such as micro-cracks, leaks at the ports, or internal contamination affecting pump operation.

Replacing the reservoir is recommended, among other things, when:

• upgrading the steering system after a pump failure,
• fixing fluid leaks around return and supply lines,
• performing comprehensive power steering system maintenance after long-term use.

Benefits of using an original reservoir

Using an original power steering fluid reservoir in the Audi A6 C6 FL helps maintain the consistency of the entire steering system with the manufacturer's factory standards. The correct shape, working capacity, and port placement influence stable fluid flow, which helps reduce cavitation and excessive pump load. This, in turn, promotes a longer service life for other system components.

If you are planning a comprehensive repair or upgrade of the steering system area in your Audi and need other parts from the same group, such as hoses, pumps, or additional expansion tanks, check the available parts in the Audi Power steering pumps category.

Technical support and part selection

When selecting hydraulic and fuel system components – such as pumps, reservoirs, or hoses – it is crucial to use reliable sources of information and catalog numbers assigned to the specific vehicle configuration. Proper component matching minimizes the risk of leaks, incorrect operating pressure, and accelerated component wear.

To better understand the relationships between individual power supply and fluid circulation elements in a car, it is worth checking out the guide Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses the principles of diagnostics, selection by identifiers, and component operation in an accessible way.

If you are considering a choice between a secondary market part and a new replacement, the practical guide 5 reasons why a used OEM part is a better choice than a replacement, which describes specific technical and economic criteria for making service decisions, may also be helpful.