Audi A4 B8 Window Strip Door Rear Right O/S Moulding Seal 8K0839478F

Audi A4 B8 Window Strip Door Rear Right O/S Moulding Seal is an original body component from the Window and moulding seals group, designed for installation in the rear right section of the vehicle. It ensures a tight fit of the moulding against the window or body edge, limiting the ingress of water, dirt, and noise into the interior. This is a practical solution for users looking to restore the factory fit and aesthetics of the rear side area in their Audi.

Specifications and technical data

• SKU: 8K0839478F
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0839478F
• Substitutable numbers: 8K0839478F, 8K0 839 478 F
• Location on the vehicle: Rear, Right
• Category: Window Seals, Gaskets & Trims

Purpose and function of the seal

The presented seal is dedicated to the rear right part of the body, where it is responsible for properly sealing the moulding against the window or the door/fender edge. Its tasks include:

• limiting the ingress of water and moisture into the interior and structural components,
• reducing wind noise flowing around the body at higher speeds,
• stabilizing the moulding and improving the fit of exterior components,
• maintaining an even gap between the window and the body.

By maintaining the correct shape and flexibility, the seal supports the acoustic and visual comfort of the vehicle, which is particularly important in cars of the Audi A4 B8 class.

Technical characteristics and fitment

The seal has been designed as a component consistent with the factory body geometry of the Audi, which translates into a precise fit for the rear right side of the vehicle. The properly profiled working edge allows for correct adhesion to the moulding and the mounting surface, minimizing the risk of leaks after proper installation.

As a part from the Window and moulding seals group, the component works with factory mounts and body structure, which facilitates service and replacement in workshop conditions or during body and paint repairs.

Condition of the component and service application

The seal comes from dismantling, which makes it a cost-effective solution while maintaining the manufacturer's original specifications. This type of component is particularly useful in situations where:

• the original seal has become worn, perished, or mechanically damaged,
• after body repairs, it is necessary to restore the seal in the rear right part of the body,
• there are leaks manifesting as wind noise, water ingress, or moulding vibrations.

Using an original component allows for maintaining structural and visual consistency, which is important for both driving comfort and the vehicle's value.

Benefits of installation in an Audi A4 B8

Replacing a worn seal with a functional component of this type brings measurable operational benefits:

• improved sealing of the rear body area – limiting the ingress of water and contaminants,
• more stable moulding seating and better fit of exterior components,
• reduction of noise in the cabin, especially during highway driving,
• more uniform appearance of the window edge and the side part of the body.

For users who care about the technical condition of the vehicle and the aesthetics of the side line, installing such a seal is a simple way to restore the factory character of the rear part of the car.

If you are planning a comprehensive repair or upgrade of the window area in your Audi and need other components from the same group, such as additional seals, trim mouldings, or sealing profiles, check the available parts in the Audi window and moulding seals category.