Land Rover Discovery L550 Front Door Window Weatherstrip Left N/O FK72-21435-A

The Land Rover Discovery L550 Left Front Door Window Seal is an original body part from the Window Seals and Trim group, designed for installation on the driver's side. It ensures a tight window seal, reduces wind noise, and protects the interior from water and dirt, maintaining the factory finish standard characteristic of the Land Rover brand.

Specifications and technical data

• SKU: FK72-21435-A
• Mark: Land Rover
• Condition: Used
• OEM Part Number: FK72-21435-A
• Substitutable numbers: FK7221435AA, FK72-21435-AA, FK7221435A, FK72-21435-A, LR058548
• Location on the vehicle: Front, Left
• Part type: Window Trim
• Category: Window Seals, Gaskets & Trims

Purpose and Function in the Vehicle

The presented seal is specifically designed for the Land Rover Discovery L550's left front door, ensuring a precise fit to the door frame and window channel. It is responsible for stable vertical window guidance, vibration reduction, and minimizing air drafts at higher speeds.

This component performs several key operational functions:

• seals the connection between the window and the door frame, improving cabin acoustic comfort,
• prevents water and dirt from entering the door,
• supports the proper operation of the window lifting mechanism,
• helps maintain the aesthetics of the window edge and the consistency of the body lines.

Original Origin and Fitment

The seal comes from the Land Rover parts line, which means it adheres to factory dimensional and material standards. Its original origin translates to:

• a secure fit to the Discovery L550's left door structure,
• compatibility with the factory window mechanism and door hardware,
• a consistent appearance with other body trim elements.

This ensures a predictable installation process, without the need for modifications or adjustments of aftermarket parts with uncertain tolerances.

Item Condition and Service Application

The seal is offered as a used part, making it an attractive service solution for collision repairs, replacement of worn or damaged trim, and restoring door seal integrity. It is a practical choice when you aim to maintain the original specification while optimizing repair costs.

This component is particularly suitable for:

• replacement after door or window removal,
• repairs after door edge corrosion,
• reducing cabin noise after wear of factory seals,
• restoring seal integrity after a collision or bodywork intervention.

Benefits of Using an Original Seal

Using an original window seal for the Discovery L550 allows you to maintain the vehicle's body performance parameters close to factory levels. The most significant benefits include:

• stable window operation – reduced risk of jamming, misalignment, and excessive play in the channel,
• improved acoustic insulation – reduction of wind noise and whistling at higher speeds,
• protection of the door interior – reduced exposure of the window lifting mechanism and electrical system to moisture,
• maintenance of window line aesthetics and proper window-to-frame fit.

Body Area and Further Expansion

If you are planning a comprehensive repair or upgrade of the door glazing area in your Land Rover and need other parts from the same group, such as guide rails, additional edge seals, or window trim strips, check the available parts in the Land Rover Window Seals and Trim category.

For users interested in deepening their knowledge of diagnostics and component selection by catalog numbers, as well as the principles of proper vehicle system operation, the guide article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair may be helpful, demonstrating best service practices when working with OEM components.