Seat Leon Mk3 5F Door Quarter Window Rear Left N/S Tinted Glass AS3 5F4845041J

Seat Leon Mk3 5F Door Quarter Window Rear Left N/S Tinted Glass is a factory-original body component designed for the rear left section of the vehicle. The AS3-rated tinted glass improves driving comfort, reduces interior heat buildup, and enhances passenger privacy while remaining fully compliant with homologation requirements. It is a practical solution for drivers looking to maintain a consistent body appearance while ensuring the functionality of the side glazing area.

Specifications and technical data

• SKU: 5F4845041J
• Mark: Seat
• Condition: Used
• OEM Part Number: 5F4845041J
• Substitutable numbers: 5F4845041J, 5F4 845 041 J
• Location on the vehicle: Rear, Left
• Category: Car Glass

Purpose and body fitment

The described window has been specifically designed for the rear left body section of the third-generation Seat Leon. It ensures proper closure of the side body line, stabilization of seals, and correct alignment of door edges and pillars. Thanks to its factory-spec shape and precise glass profile, installation is straightforward for an experienced body and glass repair shop.

This component belongs to the Car windows category, meaning it meets all requirements regarding resistance to stress, vibrations, and typical operational loads occurring in the rear section of a hatchback body.

Characteristics of AS3 tinted glass

The AS3 rating indicates glass with an increased level of tint, intended for areas where lower light transmittance is permitted compared to the windshield. In practice, this translates into:

• reduced interior heat buildup on sunny days,
• reduced glare and improved visual comfort for rear passengers,
• increased privacy in the rear cabin,
• a more cohesive, modern look for the side window line.

Tinted glass is particularly beneficial in vehicles used in urban traffic and on long journeys, where a stable cabin temperature is essential for travel comfort.

Benefits of using an original side window

Using a factory side window in the Seat Leon Mk3 allows for maintaining proper body geometry and correct interaction with seals and mounting trims. Key advantages include:

• Precise fitment – the shape and thickness of the glass are tailored to the specific body version, which facilitates installation and minimizes the risk of leaks.
• Consistent optics – the tint shade matches the other side and rear windows, ensuring the vehicle maintains a uniform appearance.
• Operational stability – the glass is adapted for use in the rear of the vehicle, where variable thermal and mechanical loads occur.

For users, this means reducing the risk of issues with fogging, wind noise, or improper seal adhesion after replacing the component.

Used condition – an informed choice and economic aspect

The offered window is a used component, which allows for a significant reduction in repair costs compared to purchasing a new part, while maintaining factory specifications. For many drivers, this is a reasonable compromise between quality and budget, especially for post-accident repairs or replacement after localized damage.

If you want to better understand how to safely choose second-hand parts and what to look for when selecting them, it is worth checking out this material: Used car parts – myths and facts you need to know. It is a practical addition to your knowledge when planning repairs using parts from the secondary market.

Support with selection and further configuration

When replacing a side quarter window, there is often a need to verify other elements within the glazing area – such as seals, trims, or mounts. To make it easier to complete your parts, we encourage you to check other products in the Car windows for your car – how to choose the right component category, where you will find additional information helpful for planning repairs and maintaining the consistency of the entire window package in your vehicle.