Ford Focus Mk3 5Dr Door Window Glass AS2 Rear Left N/S BM51-A25713-A

Ford Focus Mk3 5Dr Door Window Glass AS2 Rear Left N/S is an original component from the Car windows category, designed for installation on the driver's side in the rear part of the vehicle body. Thanks to the factory AS2 glass rating, it ensures proper light transmission, visibility comfort, and compliance with homologation requirements for side windows.

Specifications and technical data

• SKU: 1706322
• Mark: Ford
• Condition: Used
• OEM Part Number: 1706322
• Substitutable numbers: 1706322, BM51-A25713-A, BM51A25713A
• Location on the vehicle: Rear, Left
• Part type: Rear Side Window
• Category: Car Glass

Purpose and fitment for Ford Focus Mk3

The presented window glass has been designed specifically for the five-door version of the Ford Focus Mk3, intended for the rear left side of the body. This ensures proper edge profiling, correct dimensions, and compatibility with factory guides, seals, and the window lifting mechanism in the rear doors.

As a result, the installation process is predictable for a body shop technician or mechanic – without the need for modifications, adjustments, or interference with the door structure. The glass maintains the vehicle's styling line, which is important both for post-accident repairs and when replacing damaged glass due to wear and tear.

Characteristics of AS2 glass

The AS2 marking used on side windows indicates glass with controlled light transmission, compliant with standards for windows installed in the side zone of a vehicle. This type of glass:

• ensures an appropriate level of transparency for the driver and passengers,
• meets passive safety requirements,
• is adapted to work with factory seals and door guides.

In practice, this translates into stable operation of the window lifting mechanism and proper adhesion to the seals, which reduces the risk of wind noise and leaks.

Condition, origin, and use in repairs

The item comes from dismantling and is offered as a used side window, which allows for an economical repair while maintaining the manufacturer's original specifications. This type of solution is particularly beneficial for:

• post-accident repairs of the rear body section,
• replacing glass after mechanical damage (cracking, shattering),
• restoring full functionality of the rear doors after bodywork intervention.

Original glass from dismantling allows you to maintain visual consistency with the other windows in the vehicle and preserve factory optical parameters.

Benefits of choosing an original used window

Choosing an original side window from the secondary market is a reasonable compromise between cost and quality. You gain:

• factory fitment for the Ford Focus Mk3 5-door on the rear left side,
• preservation of the original body line and glazing aesthetics,
• the possibility of quick replacement without additional installation modifications.

Such a solution is particularly attractive in situations where both the repair budget and maintaining compliance with the vehicle's factory specifications are important.

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

More about the trend for used OEM parts

The growing popularity of original parts from dismantling results not only from savings but also from availability and quality stability. If you want to better understand why the market is increasingly choosing used components instead of new replacements, read the article Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026, which shows the broader context of this phenomenon.