Mercedes W204 W207 Hydraulic Power Steering Pump Reservoir OM651 A0064661501

Mercedes W204 W207 Hydraulic Power Steering Pump Reservoir OM651 is an original component from the Power steering pumps group, designed for the steering system in Mercedes vehicles with the OM651 engine. This used OEM part allows for maintaining the factory operating parameters of the system, ensuring predictable vehicle behavior and proper power transmission to the wheels.

Specifications and technical data

• SKU: A0064661501-4
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0064661501
• Substitutable numbers: A0064661501, A 006 466 15 01
• Category: Power Steering Pumps

Purpose and role in the power steering system

The hydraulic power steering pump in Mercedes W204 and W207 models with the OM651 unit is responsible for generating the appropriate pressure in the system, which translates into lighter, more precise steering operation. Using an original component from the same model family allows for maintaining the correct steering assist characteristics, in accordance with the manufacturer's specifications.

In premium class vehicles, such as Mercedes, stable pressure in the hydraulic system is crucial for safety and driving comfort. A properly selected pump minimizes the risk of noise, vibrations, and drops in steering assist during parking maneuvers or dynamic driving.

Advantages of using an original hydraulic pump

Choosing an original power steering pump for a Mercedes with an OM651 engine primarily ensures:

• preservation of the factory steering system characteristics,
• better compatibility with the existing hydraulic installation and engine accessories,
• reduced risk of issues with fitting hoses, mounts, and pulleys,
• greater predictability of vehicle behavior in emergency situations.

By using a used OEM component, you can combine reasonable repair costs with high quality and fitment. This solution is particularly beneficial when servicing high-mileage vehicles, where both durability and operational economy are important.

Selecting parts by manufacturer markings

When selecting a power steering pump for a Mercedes W204 or W207 with an OM651 engine, it is crucial to compare the manufacturer's markings and interchangeable numbers with the vehicle's data. This helps avoid installation problems and ensures compatibility with the specific body version and engine accessory configuration.

If you want to deepen your knowledge about the operation of supply systems and selecting components by manufacturer numbers, an article describing the diagnostics and regeneration of fuel supply components will be useful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. Although it concerns a different sub-assembly, the principles of identification by OEM numbers and good service practices are very similar.

Condition, origin, and cost-effectiveness of the purchase

The offered power steering pump is a used item, sourced from the dismantling of a Mercedes vehicle. Such OEM components are frequently chosen by owners of premium cars because they combine factory fitment with a more favorable price compared to new aftermarket replacements. In practice, this often translates into longer and more stable operation than in the case of cheaper non-factory parts.

If you are interested in the broader market context and want to understand why used original components for premium brands are becoming an increasingly popular choice, it is worth reading the trend analysis: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026. This will allow you to approach the planning of repairs and upgrades for your Mercedes consciously.

Comprehensive Mercedes steering system service

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.

Such an approach allows you to verify the condition of the entire system in one service stage, reduce vehicle downtime, and optimize labor costs. Replacing the power steering pump is often a good time to check other hydraulic components, which reduces the risk of later leaks or performance drops.