Seat Leon Cupra 5F Outer Weatherstrip Strip Rear Right O/S Door 5F4839478C

Seat Leon Cupra 5F Outer Weatherstrip Strip Rear Right O/S Door is a precisely fitted body component designed for the rear right side of the vehicle. It is responsible for a tight seal between the window and the door frame, which improves acoustic comfort, limits water ingress, and stabilizes the window regulator mechanism. Thanks to a design consistent with factory solutions, the weatherstrip ensures proper window guidance and an aesthetic finish to the door edge, which is important for both functional and visual reasons.

Specifications and technical data

• SKU: 5F4839478C
• Mark: Seat
• Condition: Used
• OEM Part Number: 5F4839478C
• Substitutable numbers: 5F4839478C, 5F4 839 478 C
• Location on the vehicle: Rear, Right
• Category: Doors & Door Skins

Function and role of the outer door weatherstrip

The outer door window weatherstrip in the rear right part of the body is responsible for several key operational tasks:

• limiting the ingress of water and contaminants into the door interior,
• reducing cabin noise by sealing the contact point between the glass and the door panel,
• stabilizing the window during raising and lowering,
• protecting the paint on the door edge against abrasions and corrosion.

A well-chosen weatherstrip in the Doors and door panels area has a direct impact on driving comfort, the durability of window lifting mechanisms, and long-term protection of the door structure against moisture.

Compatibility and body fitment

The presented weatherstrip is intended for installation on the rear right side of the vehicle, which eliminates the problem of universal, ill-fitting solutions. The element has been designed for the specific geometry of the door, thanks to which:

• it adheres evenly along the entire length of the edge,
• it ensures the correct contact line with the window,
• it does not require interference with the door structure or additional adjustments.

Such a fit helps maintain the factory body line and reduces the risk of leaks after installation.

Performance characteristics and installation benefits

The outer weatherstrip for the rear right window in the Leon Cupra 5F model has been designed for long-term operation in variable weather conditions. A properly selected working profile allows for:

• maintaining stable pressure against the glass during repeated opening and closing of the door,
• reducing rattles and vibrations in the window frame area,
• maintaining the aesthetic appearance of the window line, without visible deformations.

For workshops and users servicing the car themselves, it is important that the installation of the component from the Doors and door panels group does not require structural modifications, and a correctly seated weatherstrip restores the factory operating parameters of the window and door tightness.

Component condition and service application

The weatherstrip comes from disassembly, which in practice means that it is a part with parameters close to factory ones, intended for service and repair applications. This type of component will work especially well in situations where:

• the original weatherstrip has worn out, hardened, or cracked,
• there are leaks in the area of the rear right window,
• after body and paint repairs, it is necessary to restore the correct sealing system.

Using an original design allows you to maintain technical consistency with other body elements and avoid problems typical of replacements with a universal profile.

Expanding work in the door and body area

If you are planning a comprehensive repair or upgrade of the door zone in your Seat and need other elements from the same group, such as panels, reinforcements, or additional sealing profiles, check the available parts in the Seat Doors and door panels category.

For users interested in deepening their knowledge about the operation and servicing of components in premium class cars, an article describing a practical approach to handling engine equipment in popular Mercedes models may be helpful – you can find it here: Reliability under the star sign – how to take care of engine equipment in Mercedes-Benz C-Class and E-Class.