Mercedes C204 Power Steering Pump Reservoir M276 A0064664001

Mercedes C204 Power Steering Pump Reservoir M276 is an original hydraulic system component designed for Mercedes models equipped with the M276 engine. Integrating the reservoir with the power steering pump ensures consistent steering system performance, stable operating pressure, and predictable steering response. This used OEM component is a sensible choice for power steering system maintenance when you prioritize factory design and fitment without experimenting with aftermarket replacements.

Specifications and technical data

• SKU: A0064664001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0064664001
• Substitutable numbers: A0064664001, A 006 466 40 01
• Part type: Power Steering Pump
• Category: Power Steering Pumps

Purpose and function in the power steering system

The presented power steering pump with reservoir is a hydraulic system component responsible for generating and maintaining fluid pressure in the steering gear. A properly selected pump integrated with a reservoir:

• stabilizes steering system operation at both low and high engine speeds,
• reduces the risk of cavitation and fluid aeration,
• ensures predictable steering resistance throughout the entire operating range,
• supports uniform lubrication of steering gear components.

Thanks to the factory design, the correct geometry of ports and connections is maintained, which facilitates installation and minimizes the risk of system leaks.

Benefits of using an original power steering pump

Using an original reservoir-pump assembly in Mercedes cars with the M276 engine allows you to maintain steering system performance parameters consistent with the manufacturer's specifications. Key advantages include:

• Factory fitment for the hydraulic system and C204 body mounts,
• preservation of the steering characteristics intended for the specific model,
• reduction of vibration and noise due to the correct housing and mounting design,
• easier future diagnostics – operating parameters correspond to Mercedes service documentation.

Choosing a used OEM component is particularly beneficial for repairs where the priority is to maintain original specifications while optimizing costs.

Condition, verification, and preparation for installation

The item is offered as a used part, which in practice means it has been removed from a vehicle and verified for further serviceability. Such components are frequently chosen by professional workshops because they allow for:

• maintaining original build quality,
• reducing repair costs while ensuring proper functionality,
• consistency with other power steering system components.

Before installation, a standard service procedure is recommended: checking hose tightness, replacing the fluid with one compliant with manufacturer recommendations, and thoroughly bleeding the system after starting the engine.

Selection by markings and integration with other components

Due to the specific nature of the hydraulic system in Mercedes vehicles, the selection of a power steering pump with reservoir should always be based on vehicle identification data as well as OEM and reference part numbers. This helps avoid issues with:

• incorrect port and hose diameters,
• differences in body or engine mounts,
• different operating pressure characteristics.

A properly selected assembly works with the steering gear, high and low-pressure hoses, and the expansion tank in accordance with factory technical documentation.

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

Technical support and service knowledge

To better plan service work on hydraulic and fuel systems, it is worth utilizing educational materials. A detailed discussion of operating principles, diagnostics, and component selection by OEM numbers can be found in the article "Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration", which helps organize knowledge about the operation of pumps, reservoirs, and service procedures.