Audi A4 B7 4.2 FSI V8 Power Steering Pump Unit 4Z7145156E

Audi A4 B7 4.2 FSI V8 Power Steering Pump Unit is an original component from the Power steering pumps group, designed to operate in the demanding steering systems of Audi vehicles. The construction, engineered for high-power units, ensures stable system pressure, precise handling, and comfortable steering operation, especially during dynamic driving.

Specifications and technical data

• SKU: 4Z7145156E
• Mark: Audi
• Condition: Used
• OEM Part Number: 4Z7145156E
• Substitutable numbers: 4Z7145156E, 4Z7 145 156 E
• Fuel type: Diesel
• Category: Power Steering Pumps

Purpose and technical characteristics

The presented power steering pump is a hydraulic system component responsible for generating operating pressure for the steering gear. It has been developed with high-displacement engines in mind, which translates into appropriate efficiency and stability of operating parameters across a wide range of loads.

The pump works with a system powered by Diesel fuel, which means its design and operating characteristics are adapted to the specifics of compression-ignition engines – higher mileage, higher torque, and frequent operation in varied conditions.

Benefits of using an original power steering pump

Using an original power steering pump in an Audi allows you to maintain the factory parameters of the steering system. Key advantages include:

• maintaining proper steering assistance force during low-speed maneuvering,
• stable, predictable steering system reactions at higher speeds,
• reduction of the risk of noise, vibrations, and pressure drops in the system,
• better compatibility with other hydraulic components, such as hoses and the steering gear.

By maintaining compliance with factory specifications, the pump helps maintain driving safety and vehicle comfort at the level intended by the manufacturer.

Brand, origin, and condition of the component

The pump comes from the Audi range, meaning it is a part consistent with original equipment solutions. Original components from this brand are designed with the loads characteristic of powerful engines in mind, which translates into durability and repeatability of operating parameters.

The item is marked as Used, which in practice means it has been dismantled and was previously in service. Such components are often chosen as an economical alternative to new parts, allowing for reduced repair costs while maintaining the original system design.

Matching by numbers and selection safety

The power steering pump has an assigned OEM part number and corresponding interchangeable numbers, which enables precise verification of compatibility with a specific vehicle configuration. Selection based on manufacturer numbers minimizes the risk of installing an incorrect part and facilitates workshop operations.

In case of doubt, it is useful to compare the numbers with service documentation or the existing pump removed from the vehicle. This approach is particularly important in higher-power cars, where the steering system operates under greater load and requires full component compatibility.

Steering system operation and the fuel system

A functional power steering pump is just one of the elements affecting the overall vehicle performance. Proper maintenance of the engine fuel system is equally important, especially in diesel units. To better understand the relationship between engine operation and hydraulic system load, it is worth reviewing material discussing the diagnostics and maintenance of the fuel supply system – injectors, pumps, and the tank. Detailed information can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Expanding the Audi 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 additional pumps, hoses, or mounting hardware, check the available parts in the Audi Power steering pumps category.

In summary, Audi A4 B7 4.2 FSI V8 Power Steering Pump Unit is a functional, original component intended for demanding applications in Audi vehicles. Choosing this pump allows you to maintain proper steering system parameters, reduce the risk of failure, and keep driving comfort at a stable level, while simultaneously optimizing repair costs through the use of a used part.