Mercedes ML OM642 W164 W251 Power Steering Pump System Diesel A0064663101

Mercedes ML OM642 W164 W251 Power Steering Pump System Diesel is an original hydraulic system component designed for diesel-powered vehicles. It ensures stable pressure in the steering system, which translates into predictable handling and maneuvering comfort for a heavier SUV. By maintaining factory specifications, this is a solution compatible with the Mercedes power steering system design, allowing for efficient repair without modifying the installation.

Specifications and technical data

• SKU: A0064663101-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0064663101
• Substitutable numbers: A0064663101, A 006 466 31 01
• Fuel type: Diesel
• Category: Power Steering Pumps

Purpose and role in the power steering system

The presented power steering pump belongs to the Power steering pumps category and is dedicated to Mercedes ML-class models and structurally related vehicles with the OM642 engine. It is responsible for generating the appropriate operating pressure in the hydraulic system, which enables smooth steering with low resistance, even during parking or driving under full load.

In diesel vehicles, where the weight of the front axle is higher, a properly functioning power steering pump is crucial for driving stability and precision in response to steering movements. Using an original component allows you to maintain the factory operating parameters of the system, reducing the risk of noise, vibrations, or uneven steering operation.

Compatibility with the diesel engine

The pump has been designed to work with a Diesel fuel type engine, which means it is adapted to the load characteristics and thermal conditions typical of diesel units. The design takes into account:

• operation at higher torque levels generated by the diesel engine,
• stable pressure maintenance across a wide range of engine speeds,
• appropriate sealing and resistance to long-term operational loads.

As a result, the steering system maintains predictable behavior both in city traffic and during highway driving or when towing a trailer.

Characteristics of the used component

The offered power steering pump is a used component, which allows for cost-effective repair while maintaining the original build quality characteristic of the Mercedes brand. These types of OEM components are preferred by workshops and users who prioritize factory fitment and proven design over replacements with uncertain specifications.

A used power steering pump is a good solution in situations where the time to get the vehicle back on the road is important, as well as maintaining compliance with the factory hydraulic system without the need to adapt additional parts.

Benefits of using an original power steering pump

Using this pump in the steering system brings a number of practical operational benefits:

• Factory fitment – compatibility with the Mercedes power steering system design, with no need for installation modifications.
• Stable steering system operation – predictable response to steering movements, especially important in heavier SUVs.
• Possibility of quick repair – a used OEM component often shortens the vehicle's downtime in the workshop.
• Rational service costs – favorable price-to-quality ratio compared to new parts.

For users who value maintaining the original driving characteristics of the vehicle, choosing a power steering pump from this group is a technically sound solution.

Technical support and part selection

When selecting a power steering pump for a specific body and engine version, it is worth using the manufacturer's markings and vehicle data to ensure full compatibility with the hydraulic system. Proper fitment minimizes the risk of leaks, incorrect mounting, or differences in operating parameters.

If you want to better understand the relationships between fuel supply and hydraulic system components in diesel cars, our blog article will be helpful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. You will find practical tips on diagnostics, selection by part numbers, and maintenance of key sub-assemblies.

Related products and system expansion

If you are planning a comprehensive repair or upgrade of the steering system area in your Mercedes and need other elements from the same group, such as hydraulic hoses, fluid reservoirs, or additional mounting elements, check the available parts in the Mercedes Power Steering Pumps category.

Read more about how the availability of used OEM parts affects repair time and workshop organization in our guide: Availability of car parts off-the-shelf vs. repair time – how used OEM parts shorten workshop stays?. This is a practical source of knowledge for both workshops and conscious vehicle users.