Ford C-Max Mk2 Fuel Filter Box Housing Cover 1.0 EcoBoost Petrol 7M51-9E857-CEW

Ford C-Max Mk2 Fuel Filter Box Housing Cover 1.0 EcoBoost is an original fuel supply system component designed for the 1.0 EcoBoost engine. This used, factory-spec fuel filter housing ensures proper medium routing and stable mounting of the filter element, which translates into safe fuel system operation and correct filtration of contaminants. This is a solution for users looking for a proven OEM component rather than random aftermarket replacements.

Specifications and technical data

• SKU: 7M51-9E857-CEW
• Mark: Ford
• Condition: Used
• OEM Part Number: 7M51-9E857-CEW
• Substitutable numbers: 7M51-9E857-CEW, 7M519E857CEW
• Fuel type: Petrol
• Part type: Fuel Filter
• Category: Fuel Filters

Purpose and function in the fuel system

The described fuel filter housing cover belongs to the Fuel filters category and is responsible for tightly sealing the filter element and ensuring proper gasoline flow within the supply system. In the 1.0 EcoBoost engine, this is of particular importance, as precise injection requires sufficiently clean fuel and stable pressure in the supply line. A properly selected fuel filter housing:

• maintains the tightness of fuel inlet and outlet connections,
• ensures proper seating of the filter element,
• minimizes the risk of contaminants entering the injectors,
• contributes to the smooth operation of the fuel pump and the entire system.

Benefits of using an original fuel filter housing

Using a factory fuel filter housing in a Ford C-Max Mk2 with a petrol engine allows you to maintain the parameters specified by the vehicle manufacturer. The original component is designed for a specific fuel system, which means it:

• fits factory mounts and fuel line connectors,
• maintains the correct fuel flow geometry,
• reduces the risk of leaks resulting from poor fitment,
• facilitates periodic maintenance – filter element replacement is performed according to the manufacturer's procedure. For the user, this means more predictable operation and stable conditions for the injection system, which is important for both performance and component durability.

Technical characteristics and fitment

The fuel filter housing cover has been designed to work with a petrol supply system, which is crucial when selecting parts – components intended for other fuel types may differ in construction and material. In this case, we are dealing with a component prepared for the requirements of the 1.0 EcoBoost unit, which helps maintain proper flow parameters and resistance to typical operational loads. The product comes from the Ford brand, which for many users is an important argument when choosing a used part – factory elements usually work better with the existing installation, and their geometry and mounting method are consistent with service documentation. As a result, installation is predictable, and the risk of fitment issues is limited.

Application in service practice

This type of fuel filter housing is particularly useful in situations where the existing element has suffered mechanical damage (e.g., cracks, damaged mounts, worn-out line sockets) or problems with maintaining a seal have occurred. Replacing the housing itself allows for restoring proper fuel system operating conditions without the need to interfere with other components. In workshop practice, using original, used elements often represents a reasonable compromise between cost and quality – especially in the case of components that do not contain complex electronics and whose main task is to ensure proper sealing and flow geometry.

Technical support and additional materials

To better understand the role of the fuel filter housing in the entire supply path, it is worth familiarizing yourself with material describing the construction and operation of the fuel system, including the principles of selecting parts by OEM numbers and the basics of diagnostics – this is discussed in detail in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. If you are planning a comprehensive repair or upgrade of the fuel supply area in your Ford and need other elements from the same group, such as filter elements, fuel lines, or additional mounts, check the available parts in the Ford Fuel filters category.