Seat Leon Mk3 5F Door Quarter Window Rear Right O/S Tinted Glass AS3 5F4845042J

Seat Leon Mk3 5F Door Quarter Window Rear Right O/S Tinted Glass is an original body component designed for the right side of the rear bodywork. The AS3 standard tinted glass provides increased optical comfort for passengers and an aesthetic, cohesive finish to the vehicle's side profile. This solution is particularly beneficial for post-accident repairs and when replacing a damaged window with a high-quality OEM part.

Specifications and technical data

• SKU: 5F4845042J
• Mark: Seat
• Condition: Used
• OEM Part Number: 5F4845042J
• Substitutable numbers: 5F4845042J, 5F4 845 042 J
• Location on the vehicle: Rear, Right
• Category: Car Glass

Purpose and function of the window

The described window is a rear side body component, mounted on the right side of the vehicle. Its purpose is to provide a stable seal for the cabin space, maintain body rigidity, and ensure correct glazing geometry. Thanks to its precise profile and factory fitment, the window works seamlessly with seals, moldings, and other body panels, which reduces the risk of leaks and unwanted wind noise while driving.

AS3 tinted glass – comfort and protection

The AS3 standard indicates darker tinted glass, which reduces the amount of sunlight entering the interior. In practice, this translates into:

• reduced heating of the rear cabin on sunny days,
• increased privacy for passengers and luggage,
• a more toned-down, modern look for the side profile of the body.

The tinted rear quarter window fits well with the character of the dynamic hatchback that is the third-generation Leon, improving both user comfort and the visual consistency of the car.

Original Seat part – fitment and safety

As an element from the Car windows category, the glass was designed specifically for the Seat Leon Mk3 5F body. This ensures the maintenance of factory parameters regarding glass thickness, curvature, and field of view, which is important for passive and active safety. The original glass works with the structure of the pillars and roof, and when properly installed, it supports body rigidity in the rear zone.

The product comes from dismantling, making it a good choice for an economical vehicle repair when you want to maintain the original technical specifications without having to resort to aftermarket replacements with uncertain parameters.

Practical application and installation

The right rear quarter window is intended for installation in the rear part of the body on the passenger side. Replacing this component is typical in cases of:

• side damage in the area of the rear wheel arch and pillar,
• cracks or scratches on the glass that hinder visibility,
• body restoration after previous non-factory repairs.

Due to the nature of the glass element, installation in a specialized body and glass repair shop is recommended, using appropriate seals and adhesives. A properly seated window minimizes the risk of leaks, noise, and stresses that could shorten its durability.

Why choose this window for your Seat Leon Mk3 5F?

Choosing an original, tinted rear quarter window is a way to maintain a consistent look for all glazing, without differences in shade or tint level between the sides of the vehicle. It also offers:

• compliance with factory safety and glass quality standards,
• aesthetic fit to the body lines and other windows,
• reasonable repair costs thanks to the use of a used part of known origin.

If you are planning a broader modernization or repair of your car and are interested in how the selection of appropriate elements affects the character of the vehicle, it is worth reading the article on the evolution of construction and parts selection in sports hatchbacks using the VW Golf GTI as an example, which shows how thoughtful component replacement can improve the functionality and appearance of the vehicle.