Ford Focus Mk2 Front Windscreen Wiper Motor Linkage Mechanism 4M51-17504-BB

Ford Focus Mk2 Front Windscreen Wiper Motor Linkage Mechanism is a factory-original component from the Wiper Motors and Linkages group, designed for operation on the front windscreen. It ensures proper power transmission from the motor to the wiper arms, which translates into stable, predictable operation of the windscreen cleaning system during daily use.

Specifications and technical data

• SKU: RHD-4M51-17504-BB
• Mark: Ford
• Condition: Used
• OEM Part Number: 4M51-17504-BB
• Substitutable numbers: 4M51-17504-BB, 4M5117504BB, 3397020777, 4M5117508BA, 4M51-17508-BA, 3 397 020 777, 0390241732, 0 390 241 732
• Location on the vehicle: Front
• Part type: Wiper Linkage
• Category: Wiper Linkages, Transmissions & Motors

Purpose and function in the vehicle

The described mechanism is the component responsible for the operation of the wipers on the front windscreen, mounted in the cowl area. It connects the wiper motor to the arms, converting rotary motion into precise oscillating movement of the blades. A properly functioning gear and linkage system is crucial for maintaining visibility during rain, snow, or driving in urban and motorway conditions.

The mechanism is structurally matched to the Ford Focus Mk2, which means correct operating geometry, the appropriate range of arm travel, and correct positioning of the wipers in the rest position. As a result, the system works with the factory controls without the need for modifications or adaptations.

Construction and technical properties

The mechanism belongs to the Wiper Motors and Linkages group, where structural rigidity, resistance to cyclic loads, and stable arm guidance are key. The assembly consists of a system of levers and rods working with the motor, forming a closed kinematic chain. This solution minimizes operating play and allows for maintaining even pressure of the blades against the glass over their entire range of motion.

The element is designed as an OEM part by Ford, which in practice means compliance with factory standards for assembly, geometry, and cooperation with other cowl components. This ensures compatibility with original wiper arms and the factory control system.

Condition, fitment, and installation

The product is offered as a used original component, which allows for combining reasonable cost with the preservation of the factory design. For proper selection, it is recommended to verify compatibility using the OEM number and interchangeable numbers in the technical specifications tab, as well as to compare the shape and mounting points with the currently installed mechanism.

The mechanism is intended for installation in the front part of the vehicle, in the cowl area. When replacing, it is worth paying attention to:

• correct setting of the wiper arm rest position,
• condition of mounts and guide bushings,
• smoothness of the lever movement after connection to the motor.

A correctly selected and installed assembly reduces the risk of arm skipping, uneven blade operation, and excessive vibrations during intensive use.

Benefits of using the original mechanism

Using the original mechanism in the Ford Focus Mk2 allows for maintaining the factory operating parameters of the wiper system. The most important advantages include:

• secure fit to the body and factory mounting points,
• preservation of the correct operating range and path of the arms,
• consistency with original controls and electrical protections,
• possibility of economical repair of the wiper system without interfering with the vehicle's installation.

For the user, this means stable wiper operation, predictable behavior in difficult weather conditions, and reduced risk of windscreen damage caused by improperly working arms.

Part selection and additional technical information

When selecting this mechanism, it is worth using the manufacturer's markings and reference numbers visible in the specifications section. This allows for verifying compatibility with a specific equipment version and model year of the Ford Focus Mk2. In case of doubt, a visual comparison of the linkage system and mounting points with the removed element is also helpful.

If you are planning a comprehensive repair or upgrade of the wiper system area in your Ford and need other components from the same group, such as drive motors, linkages, or complete mechanism assemblies, check the available parts in the Ford Wiper Motors and Linkages category.

More practical information on the cost-effectiveness of using used drive components, methods of verifying markings, and principles of selecting parts by OEM number can be found in the article: Why it is worth buying used gearboxes and engines – facts instead of myths.