Ford Mondeo Mk4 Door Window Glass Seal Weatherstrip Left N/S Chrome Strip

Visual condition of the part

The product shows signs of use visible in the photos.

Ford Mondeo Mk4 Door Window Glass Seal Weatherstrip Left N/S Chrome Strip is a precisely fitted body component responsible for effective water drainage and stable window guidance within the door. Thanks to its factory-spec geometry and the use of original Ford technology, this part ensures a proper seal, reduces cabin noise, and enhances the aesthetics of the vehicle's side profile.

Specifications and technical data

• SKU: BS71-A21511-AJ
• Mark: Ford
• Condition: Used
• OEM Part Number: BS71A21511AJ
• Substitutable numbers: BS71A21511AJ, BS71-A21511-A, BS71A21511A
• Location on the vehicle: Left
• Part type: Window Seal
• Category: Window Seals, Gaskets & Trims

Purpose and function of the component

The presented seal belongs to the Window seals and trim category and is designed for installation on the left side of the Ford Mondeo Mk4 body. It is responsible for:

• guiding the window within the door plane during raising and lowering,
• limiting the ingress of water and contaminants into the door interior,
• reducing wind noise at higher speeds,
• stabilizing the window edge relative to the door frame.

Thanks to its correct profile, the seal works in harmony with the factory window lifting mechanism, which translates into smooth operation and reduced load on the window regulator.

Construction and technical features

The component combines a flexible window seal with an external trim finished with a chrome insert. This design:

• ensures a tight fit against the window edge and door panel,
• protects the upper edge of the sheet metal from abrasion and corrosion,
• creates an aesthetic decorative line along the lower edge of the window.

The chrome trim gives the body a more refined, visually cohesive character, blending well with other exterior trim elements.

Compatibility and fitment

As a part developed by Ford, the seal is structurally matched to the geometry of the Ford Mondeo Mk4 door on the left side. This means:

• compatibility with factory mounting points,
• the correct profile for sealing against the window and door frame,
• no need for modifications or forced fitting.

This solution facilitates installation and allows for maintaining sealing parameters and acoustic comfort close to factory standards.

Condition and benefits of use

The offered item is used, which allows for an economical replacement of a worn or damaged seal while maintaining the manufacturer's original specifications. Using this part helps to:

• reduce window fogging resulting from leaks,
• lower the risk of water entering the door interior,
• improve acoustic comfort inside the cabin,
• restore the cohesive look of the side body line thanks to the chrome trim.

Expanding upgrades for windows and trim

If you are planning a comprehensive repair or upgrade of the side glazing area in your Ford and need other components from the same group, such as additional guide seals, trim strips, or lower window stops, check out the available parts in the Ford window seals and trim category.

Knowledge and practical tips

If you are also thinking about improving your car's performance and want to better plan service work and potential modifications, a guide on tuning using aftermarket parts may be helpful – you can find it in the article How to increase engine power: a practical guide to engine tuning with used parts.