Ford Fiesta St Mk5 Front Door Glass Run Seal Right O/S 2S51-B21510-AH 1434066

Visual condition of the part

The product shows signs of use visible in the photos.

Ford Fiesta St Mk5 Front Door Glass Run Seal Right O/S is an original component from the Window seals and trims group, designed for installation on the driver's side in the right-hand drive version. The precisely shaped profile ensures stable glass guidance, reduces wind noise, and helps maintain proper sealing within the door area.

Specifications and technical data

• SKU: 2S51-B21510-AH
• Mark: Ford
• Condition: Used
• OEM Part Number: 2S51-B21510-AH
• Substitutable numbers: 2S51-B21510-AH, 2S51B21510AH, 1434066
• Location on the vehicle: Front, Right
• Category: Window Seals, Gaskets & Trims

Purpose and technical function

The presented glass run seal is dedicated to the front right door of the Ford Fiesta St Mk5. The component is mounted in the door frame and creates a guide for the window, stabilizing its vertical movement and reducing vibrations while driving. This improves acoustic comfort inside the vehicle and ensures smooth window operation for both electric and manual systems.

The seal belongs to the group of components responsible for protecting the interior from water, dust, and wind gusts. A properly selected and installed profile reduces the risk of window fogging, drafts at higher speeds, and unwanted rattling caused by play in the window guide.

Construction and fitment for Ford Fiesta St Mk5

As a Ford brand part, the seal has been designed for the specific dimensions and geometry of the front right door in the Fiesta St Mk5 model. Properly contoured corners and straight sections allow for secure seating in the factory slots, without the need for modifications or "forced" fitting.

Key design features of this component include:

• dedicated placement in the front right door zone,
• profile adapted to the factory window frame contour,
• maintenance of proper pressure against the glass edge along the entire length of the guide.

Such fitment translates into stable window operation and reduced wear on the lifting mechanism, which does not have to compensate for additional resistance resulting from incorrect seal geometry.

Benefits of using an original seal

Using an original component from the Window seals and trims category in a Ford Fiesta St Mk5 brings a number of practical operational benefits:

• more uniform window guidance, which reduces the risk of tilting and scratching,
• better suppression of external noise compared to generic replacements,
• maintenance of the factory level of sealing within the door area,
• visual consistency with other seals and trims in the vehicle.

For users who care about the condition of the bodywork and driving comfort, replacing a worn or damaged window guide with an original component is a simple way to improve daily door functionality and reduce unwanted noises while driving.

Characteristics of the used component

The offered seal is a used component, which in practice means it comes from disassembly and has been verified for further installation suitability. Such components are often chosen by conscious users who are looking for original parts at a reasonable price, while maintaining proper fitment and predictable performance during operation.

In the case of glass run seals, it is particularly important that the profile retains its geometry and flexibility to a degree that allows for proper adhesion to the glass and door frame. A used element, but selected from the same vehicle model and generation, often provides better compatibility than random replacements with a universal shape.

Comprehensive service for Ford window and door zones

If you are planning a comprehensive repair or upgrade of the window and door zone in your Ford and need other elements from the same group, such as guides, perimeter seals, or window trims, check out the available parts in the Ford window seals and trims category.

For drivers interested in making informed choices regarding aftermarket components, including body parts, expert materials explaining how to safely use used sub-assemblies may also be useful. In the broader context of selecting parts from disassembly, it is worth reading the guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses the practical aspects of selecting used components based on OEM numbers and actual technical parameters.