Audi A8 D3 Power Steering Fluid Reservoir Tank 3.0 TDI 3.2 Petrol 4E0422373N

Audi A8 D3 Power Steering Fluid Reservoir Tank 3.0 TDI 3.2 Petrol is an original hydraulic system component, designed specifically for this model. Thanks to its factory design, it ensures proper fluid circulation and storage, which translates into stable steering gear operation and driving comfort. This used OEM component is a sensible choice for drivers looking for a proven, perfectly fitted solution rather than universal replacements.

Specifications and technical data

• SKU: 4E0422373N
• Mark: Audi
• Condition: Used
• OEM Part Number: 4E0422373N
• Substitutable numbers: 4E0422373N, 4E0 422 373 N, 4E0422371N, 4E0 422 371 N
• Category: Other Steering & Suspension Parts

Purpose and function in the power steering system

The described reservoir is a component of the power steering system in the Audi A8 D3 generation with 3.0 TDI and 3.2 petrol engines. Its task is to:

• maintain the appropriate amount of power steering fluid in the circuit,
• stabilize operating pressure in the system,
• work with hoses and the power steering pump to ensure smooth operation of the steering rack,
• limit fluid aeration, which reduces the risk of noise and a drop in steering efficiency. Thanks to being tailored to the specific A8 D3 generation, the reservoir maintains the correct geometry of connections and the position of mounts, which facilitates installation and subsequent maintenance.

Original origin and compatibility

The product comes from the Audi OE line, which means compliance with factory quality and design standards. The original reservoir:

• is designed for the specific operating parameters of the power steering system in the Audi A8 D3,
• ensures proper fitment to stock brackets and hoses,
• eliminates the risk of problems resulting from the use of universal solutions. As a result, it provides a safe and predictable foundation for steering system repair, especially in luxury class cars, where steering precision is of key importance.

Characteristics of the used component

The offered reservoir is a used item, which allows for a significant reduction in repair costs while maintaining the original specification. In practice, this means:

• factory design and material consistent with the Audi project,
• preservation of the stock layout of ports and mounts,
• possibility of installation as a replacement for a damaged or leaking reservoir. Before installation, standard service procedures are recommended: checking hose tightness, replacing the power steering fluid, and thoroughly bleeding the system to fully utilize the potential for proper hydraulic operation.

Benefits of using the original reservoir

Choosing the original power steering fluid reservoir for the Audi A8 D3 brings a number of practical benefits:

• certainty of fitment for the specific engine version,
• preservation of the factory operating characteristics of the steering system,
• reduction of the risk of leaks and fluid pressure problems,
• easier diagnostics and service in the future thanks to the use of an OE component. For users who value the comfort of driving a premium limousine, it is particularly important that the power steering system operates predictably and without interference – this is exactly what a properly selected, original reservoir is for. If you are planning a comprehensive repair or upgrade of the power steering hydraulic area in your Audi and need other elements from the same group, such as hoses, pumps, or additional reservoirs, check the available parts in the Other Audi category.

Technical support and knowledge about Audi models

For a better understanding of the design differences between individual model lines of the manufacturer, it is worth reaching for expert materials. Extensive information on the specifics of sports versions and standard variants can be found in the article Audi RS vs other models – what is hidden under the hood and chassis?, which helps to better assess the requirements for components in various Audi car configurations.