Ford S-Max Door Window Gasket Rear Left N/S Seal Sealing Rubber AM21-R25825

Ford S-Max Door Window Gasket Rear Left N/S Seal Sealing Rubber is a precise, original component from the Doors and door panels category, responsible for sealing and stable window guidance. The carefully designed rubber profile ensures proper adhesion to the door edge, reducing noise, vibrations, and water ingress into the vehicle interior. This is a practical solution for users who want to restore the proper operation of the rear left side window.

Specifications and technical data

• SKU: 1777860
• Mark: Ford
• Condition: Used
• OEM Part Number: 1777860
• Substitutable numbers: AM21-R25825, AM21R25825, 1777860, 6M21R25825AR, 6M21-R25825-AR
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Purpose and function of the window gasket

The presented gasket is designed for installation in the rear left part of the body, within the passenger door area. It is responsible for sealing the window perimeter and guiding it stably in the tracks during opening and closing. The properly selected rubber shape minimizes the risk of the window lifting mechanism jamming and reduces the formation of unwanted play.

By using an original component matched to a specific Ford model, factory assembly tolerances are maintained, which translates into the correct operation of the entire door module and acoustic comfort inside the cabin.

Benefits of using an original Ford gasket

Using a dedicated window gasket in a Ford S-Max allows for the restoration of the original protective and functional properties of the door. Key advantages include:

• Better acoustic insulation – reduction of wind noise at higher speeds and reduction of vibrations transmitted from the body.
• Protection against moisture – a properly fitted rubber profile reduces the risk of water entering the door interior and the cabin.
• Stable window guidance – proper positioning of the window in the tracks supports even operation of the regulator and reduces mechanical loads.
• Aesthetic door edge finish – maintaining a consistent body line and the factory look of the vehicle's side.

Choosing an original component from the Doors and door panels group helps avoid problems typical of replacements with inaccurate profiles or rubber compounds that are too hard.

Assembly and functional characteristics

The rear left window gasket is structurally prepared for installation in the factory mounting points of the Ford S-Max door. Properly profiled edges facilitate seating on the door frame, and the flexible rubber adapts to the sheet metal contours. This makes it possible to recreate the original window contact line without the need for additional modifications.

The item comes from dismantling, which means it is a used original Ford part, maintaining the construction and geometry consistent with the factory standard. This is a practical solution for users who want to maintain the technical integrity of the vehicle while optimizing repair costs.

Application in the door and body system

The gasket works in the immediate vicinity of the window lifting mechanism, the lock, and the door skin, so its condition affects several operational areas:

• travel comfort – reduction of drafts and noise in the rear part of the cabin,
• durability of internal door components – reducing the risk of upholstery dampness and corrosion of internal metal parts,
• proper door closing – stable adhesion of the gasket to the window and frame improves the perceived "softness" of closing.

By maintaining the correct profile and flexibility, the gasket supports even distribution of window pressure along the entire perimeter, which is important for long-term, trouble-free operation.

If you are planning a comprehensive repair or upgrade of the door zone in your Ford and need other components from the same group, such as panels, frames, or additional gaskets, check the available parts in the Ford Doors and door panels category.

For drivers interested in a broader approach to maintaining the car in good condition, including monitoring the engine operating temperature, practical tips regarding the cooling system may also be useful – you can find them in the article Engine cooling system – overheating, repair, and used radiators.