Ford Focus Mk2 Front Door Window Glass Left N/S AS2 Green 4M51-B21411-AE

Ford Focus Mk2 Door Window Glass Front Left N/S AS2 Green is an original component from the Car windows group, designed for installation on the passenger side in a right-hand drive (N/S) version. The use of AS2-type glass in a green tint ensures comfortable light transmission and a consistent appearance with the factory body glazing. This is a practical solution for users who want to restore full functionality and aesthetics to the side cabin area of their Ford.

Specifications and technical data

• SKU: 4M51-B21411-AE
• Mark: Ford
• Condition: Used
• OEM Part Number: 4M51-B21411-AE
• Substitutable numbers: 4M51-B21411-AE, 4M51B21411AE, 1342626
• Location on the vehicle: Front, Left
• Part type: Front Side Window
• Category: Car Glass

Purpose and fitment for Ford Focus Mk2

The presented window is designed specifically for the front left door of the Ford Focus Mk2, which ensures a proper fit to the door frame and factory guides. The placement on the vehicle, defined as front – left side, guarantees compatibility with the body geometry and correct operation with the window regulator mechanism.

Thanks to its construction compliant with the AS2 standard, the window meets the requirements for light transmission and road safety. The green tint of the glass helps reduce interior heating and improves visual comfort for the driver and passengers.

Technical characteristics of AS2 glass

Glass marked with the AS2 class is used in the side windows of vehicles, providing the right balance between transparency and solar radiation filtering. In practice, this translates into:

• stable visibility in various lighting conditions,
• reduction of glare and eye fatigue,
• better protection of the interior against excessive heating.

The green tint of the glass is selected to maintain consistency with the other glazing elements of the Ford Focus Mk2, which is important for both aesthetic and practical reasons.

Benefits of using an original Ford window

Using an original window from the Car windows group in a Ford Focus Mk2 allows you to maintain the vehicle's factory parameters regarding safety, body rigidity, and driving comfort. A component coming from the same product line as the original factory equipment ensures:

• proper fit with seals and the door frame,
• correct cooperation with the window regulator and guides,
• appropriate glass thickness and structure in accordance with the manufacturer's specifications.

Thanks to this, the replacement process is predictable, and the risk of problems with door closing, leaks, or wind noise while driving is minimized.

Condition of the item and use in repairs

The offered window is a used part, which makes it a reasonable choice for post-accident repairs, replacement after mechanical damage, or body restoration. In many cases, this allows for a significant reduction in the cost of restoring the vehicle's full functionality while maintaining the original manufacturer's specifications.

Replacing a side door window is particularly important from the point of view of passive safety and protection against external factors. A correctly selected component ensures tightness, appropriate door structure rigidity, and acoustic comfort inside the vehicle.

Technical support and knowledge about OEM parts

When selecting windows and other body components, it is worth paying attention to OEM markings and compatibility with a specific vehicle generation. To better understand the importance of original components in the context of safety and durability, read the article: OEM quality guarantee and safety – why used original car parts are the best choice for your car?.

If you are planning a comprehensive repair or upgrade of the side glazing area in your Ford and need other elements from the same group, such as rear side windows, right door windows, or additional quarter glass, check the available parts in the Ford car windows category.