Ford Focus Mk3 III Weatherstrip Seal Door Rear Left N/S Gasket BM51-A25861-AD

Ford Focus Mk3 III Weatherstrip Seal Door Rear Left N/S Gasket is a precisely fitted component from the Door upholstery group, designed for installation in the rear left door. It is responsible for guiding the window securely, reducing noise, and protecting the interior of the door from moisture and contaminants, which translates into stable operation of the window regulator mechanism and acoustic comfort in the cabin.

Specifications and technical data

• SKU: BM51-A25861-AD
• Mark: Ford
• Condition: Used
• OEM Part Number: BM51-A25861-AD
• Substitutable numbers: BM51-A25861-AD, BM51A25861AD, 1747505
• Location on the vehicle: Rear, Left
• Category: Door Panels

Purpose and function of the window seal

The described seal has been designed specifically for the rear left body section of the third-generation Ford Focus. Its task is to guide the window in the tracks and seal the contact point between the glass and the door frame. This limits water ingress into the door interior, reduces the risk of corrosion of internal components, and supports the proper operation of the window regulator.

A properly selected seal also contributes to the reduction of wind noise while driving, which improves the overall comfort of using the vehicle. Using an original solution from the Door upholstery group allows for maintaining the factory standard of fit and aesthetics.

Construction and fitment for Ford Focus Mk3

The seal is profiled to the specific shape of the rear left door frame, which facilitates installation and ensures a stable fit on the edges. The design intended for operation in the rear part of the body takes into account typical operational loads, such as frequent door opening, window movement, and temperature changes.

The element has been developed to maintain proper pressure against the glass along its entire length, which minimizes play and unwanted vibrations. As a result, the window moves smoothly in the guide, and the risk of scratches and leaks is limited.

Benefits of using an original seal

• Factory fitment for the rear left body section of the third-generation Ford Focus.
• Stable window guidance and support for the lifting mechanism.
• Limitation of moisture ingress into the door interior.
• Improvement of acoustic comfort through the reduction of wind noise.
• Consistent appearance of the door edge with other trim elements.

Choosing such an element is a beneficial solution both for post-collision repairs and for addressing the effects of operational wear when the existing seal is deformed or leaking.

Condition and service application

The product comes from disassembly, which allows for an economical repair while maintaining the original geometry and material characteristics. This type of element is particularly useful in situations where there are symptoms such as increased noise from the door area, stiffer window operation, or visible signs of wear on the existing seal.

When replacing, it is worth paying attention to proper seating in the mounting grooves and even pressure along the entire length to fully utilize the advantages of the factory profile and ensure long-term tightness.

Related Ford door trim elements

If you are planning a comprehensive repair or upgrade of the door area in your Ford and need other elements from the same group, such as door panels, trim strips, or additional seals, check the available parts in the Ford door upholstery category.

To better understand the importance of using original body and interior components and the correct selection of used parts by identification numbers, it is worth reading our guide material: Audi five-cylinder engine – a legend from Quattro to RS3 and how to take care of it with original Audi parts.