Audi A8 D4 Power Steering Pump Fluid Reservoir Tank 3.0 TDI 4F0422371D

Audi A8 D4 Power Steering Pump Fluid Reservoir Tank 3.0 TDI is an original hydraulic system component designed to work with the factory steering system in the Audi A8 D4 generation model with a 3.0 TDI engine. This component from the Power steering pumps group ensures a stable fluid supply to the system, which translates into predictable steering performance and driving comfort for this premium class vehicle.

Specifications and technical data

• SKU: 4F0422371D-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0422371D
• Substitutable numbers: 4F0422371D, 4F0 422 371 D, 4F0422371E
• Category: Power Steering Pumps

Purpose and function in the power steering system

The presented power steering fluid reservoir is a hydraulic system component responsible for storing and stabilizing the working medium for the power steering pump and the steering gear. The proper design of the reservoir limits fluid foaming, helps maintain the correct operating pressure, and promotes the smooth operation of the entire system, which is particularly important in a heavy, well-equipped limousine such as the Audi A8 D4. A properly selected reservoir minimizes the risk of cavitation, pump noise, and drops in steering efficiency under heavy loads, e.g., during parking maneuvers or dynamic highway driving.

Benefits of using an original Audi reservoir

Using an original power steering fluid reservoir in the Audi A8 D4 brings a number of practical advantages:

• precise fit to factory mounts and power steering hoses,
• preservation of the factory operating characteristics of the pump and steering gear,
• reduction of the risk of leaks resulting from inaccurate fitment of aftermarket replacements,
• consistency with the manufacturer's factory requirements regarding fluid flow and filtration. Thanks to this, the driver maintains predictable, comfortable steering operation, and the entire system is less exposed to accelerated wear resulting from operation with improperly selected components.

Product characteristics and condition

The offered power steering fluid reservoir comes from an Audi vehicle and is an OEM class component, which means full compliance with the factory specifications of the A8 D4 3.0 TDI model. The product is marked in the warehouse system as SKU, which facilitates clear identification and selection of the correct part for a specific vehicle configuration. The part has an assigned OEM part number and relevant interchangeable numbers, which allows for compatibility verification using the manufacturer's catalogs or the VIN. The condition of the item is defined as used, which in practice means that it comes from disassembly, and its performance parameters result from previous operation in a vehicle.

Selection, installation, and system integration

When selecting a power steering fluid reservoir for the Audi A8 D4 3.0 TDI, it is crucial to rely on the manufacturer's catalog data and part identification numbers. This allows you to avoid problems with the compatibility of connectors, hose diameters, or mounting methods in the engine compartment. A properly selected reservoir enables:

• trouble-free installation at factory mounting points,
• correct connection of supply and return hoses,
• maintenance of the proper fluid level and easy inspection of its condition. During installation, it is recommended to simultaneously check the condition of the hoses, clamps, and the power steering fluid itself to minimize the risk of subsequent leaks and ensure stable operation of the entire system.

Technical support and additional materials

In the case of more complex service work, also involving other hydraulic or fuel system elements, educational materials regarding diagnostics and part selection by OEM numbers may be helpful. For example, issues related to component identification, service procedures, and the selection of consumables are discussed in more detail in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which organizes knowledge about the operation of supply systems and may also be helpful when planning comprehensive repairs. If you are planning a comprehensive repair or upgrade of the steering and hydraulic system area in your Audi and need other elements from the same group, such as hoses, pumps, or power steering gears, check the available parts in the Audi power steering pumps category.