Ford Focus Mk3 Estate Tailgate Rear Window Wiper Arm BM51-17406-AC

Ford Focus Mk3 Estate Tailgate Rear Window Wiper Arm is an original component from the Wiper arms category, designed for the rear window of the estate version. It ensures stable guidance of the wiper blade, which translates into a clear field of vision and safe driving in difficult weather conditions.

Specifications and technical data

• SKU: BM51-17406-AC-1
• Mark: Ford
• Condition: Used
• OEM Part Number: BM51-17406-AC
• Substitutable numbers: BM51-17406-AC, BM5117406AC, 1786268
• Location on the vehicle: Rear
• Part type: Wiper Arm
• Category: Wiper Arms

Purpose and function

The rear window wiper arm is responsible for precisely pressing the blade against the glass and ensuring uniform movement across the entire working surface. In the Ford Focus Mk3 estate model, this is particularly important as the rear window is highly exposed to dirt, mud, and road salt. A properly selected arm reduces streaks, improves water removal efficiency, and supports the correct operation of the wiper mechanism.

Construction and fitment for Ford Focus Mk3 Estate

The presented arm has been designed specifically for the rear window of the third-generation Ford Focus in the estate body style, taking into account the geometry of the tailgate and the wiper's range of motion. The appropriate profiling and mounting point allow for secure seating on the mechanism axis and the correct working angle relative to the glass. Thanks to its factory origin, key parameters are maintained, such as:

• appropriate arm length matched to the rear window surface,
• proper blade pressure against the glass,
• compatible mounting method to the wiper mechanism,
• preservation of the original body line and tailgate aesthetics.

Vehicle placement and role in safety

The component is intended for the rear part of the vehicle, where it is responsible for maintaining good rear visibility during rain, snow, or driving on dirty roads. A functional rear window wiper arm has a direct impact on the comfort of maneuvering, reversing, and observing the situation behind the vehicle in the rearview mirror. A properly functioning rear window wiper system reduces the risk of insufficient visibility, which is especially important in urban traffic, while parking, and on expressways during heavy precipitation.

Performance characteristics and advantages of using a used part

The offered wiper arm comes from the used parts segment, which allows for optimizing repair costs while maintaining the original design and fitment for the Ford. Compared to low-budget replacements, the original arm provides more stable operation, better fitment with the mechanism, and a consistent look with other body elements. Replacing the arm is beneficial in situations where:

• the old component has developed play causing uneven wiper operation,
• mechanical damage has occurred (bending, cracking, damage to the mount),
• the blade does not adhere properly to the glass despite being replaced,
• the mechanism works correctly, but the arm does not transfer movement across the full range. Selecting an original arm for a specific model minimizes the risk of installation problems and ensures predictable performance over a long service life.

Compatibility, reference numbers, and technical support

The wiper arm has a dedicated OEM part number and associated interchangeable numbers, which facilitates clear identification in catalogs and service systems. This allows for precise verification of compatibility with a specific version of the Ford Focus Mk3 estate, avoiding the accidental selection of a component from a different body style or model year. In case of doubts during selection, it is worth comparing the markings with the vehicle specification or using the help of a technical advisor to ensure that the ordered arm will be fully compatible with the existing wiper mechanism. If you are planning a comprehensive repair or upgrade of the area responsible for window cleaning in your Ford and need other components from the same group, such as additional arms, mounts, or elements working with blades, check the available parts in the Ford Wiper arms category.

Operation of used wiper arms and good service practices

When installing a used rear window wiper arm, it is recommended to check the condition of the mechanism axis, the mounting nut, and the blade itself. Proper tightening and setting the rest position of the arm relative to the glass allows avoiding rubbing against seals or body elements. Regular blade replacement and periodic checking of the arm pressure extend the life of the entire system. More practical tips regarding the cost-effective use of second-hand parts, diagnosing wiper faults, and planning the scope of repairs can be found in the article Operational faults vs. costs: how to repair a car using used auto parts?.