Seat Leon Mk3 5F Windows Outer Seal Gasket Strip Rear Left N/S 5F4839477B

Seat Leon Mk3 5F Windows Outer Seal Gasket Strip Rear Left N/S is a precisely profiled body component responsible for the tightness and stable operation of the rear driver-side window. A properly selected seal from this group provides protection against water, noise, and air turbulence, while also ensuring an aesthetic finish for the window edge. Thanks to its factory-fit design for the Leon Mk3 model, installation is predictable and technically correct.

Specifications and technical data

• SKU: 5F4839477B
• Mark: Seat
• Condition: Used
• OEM Part Number: 5F4839477B
• Substitutable numbers: 5F4839477B, 5F4 839 477 B
• Location on the vehicle: Rear, Left
• Part type: Window Seal
• Category: Window Seals, Gaskets & Trims

Purpose and function of the seal

The presented outer window seal is designed for installation in the rear left part of the body, in the side window area. This component is responsible for:

• sealing the contact point between the window and the body panel,
• limiting the ingress of water and moisture into the door interior,
• reducing wind noise while driving,
• stable window guidance during opening and closing.

A well-chosen seal from this group helps maintain the proper operation of the window lifting mechanism and reduces the risk of accelerated corrosion around the door edges.

Benefits of using an original Seat seal

Outer seals dedicated to a specific vehicle model, such as the third-generation Leon, ensure proper adhesion to the glass and bodywork without the need for modifications. In practice, this means:

• consistent fit with the body line and factory stampings,
• maintaining the original geometry of the gap between the window and the door,
• lower load on the window lifting mechanism due to appropriate guiding friction.

Using components from the Window seals and strips group matched to a specific model helps maintain the factory level of acoustic comfort and improves the overall operation of the side windows.

Installation and operational characteristics

The seal designed for the rear left side of the vehicle is profiled to the specific shape of the window frame, which facilitates its correct seating. During replacement, it is worth paying attention to:

• cleaning the mounting slot of old seal residues and debris,
• checking the condition of the door edge and window frame for corrosion,
• correct positioning of the seal along the entire perimeter, without twists or tension.

An installation prepared in this way allows you to fully utilize the advantages of the component and ensures stable, long-lasting operation of the rear driver-side window.

Selecting components from the same group

If you are planning a comprehensive repair or upgrade of the side glazing area in your Seat and need other components from the same group, such as additional edge seals, trim strips, or window guides, check the available parts in the Seat window seals and strips category.

Technical support and cost optimization

When planning broader bodywork and mechanical repairs, it is worth using reliable advice on part selection and budget optimization. Additional tips on an economical approach to repairs using original components can be found in the article on economical operation and savings in mechanical and bodywork repairs, which helps to better plan vehicle service in terms of costs and the durability of the applied solutions.