Audi A4 B8 Window Seal Door Rear Right O/S Sealing Gasket Strip 8K9839440F

Audi A4 B8 Window Seal Door Rear Right O/S Sealing Gasket Strip is an original body component from the Window seals and strips group, designed for installation in the rear right door area. The precisely matched geometry of the seal ensures a tight fit for the window, reduces wind noise, and supports the proper operation of the window lifting mechanism.

Specifications and technical data

• SKU: 8K9839440F
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K9839440F
• Substitutable numbers: 8K9839440F, 8K9 839 440 F
• Location on the vehicle: Rear, Right
• Category: Window Seals, Gaskets & Trims

Purpose and function in the Audi body

The presented window frame seal is dedicated to the rear right door of the Audi A4 B8 generation. The component is responsible for:

• sealing the contact point between the window and the door frame in the rear part of the body,
• limiting the ingress of water and contaminants into the door interior,
• reducing wind noise at higher speeds,
• stable guidance of the window in the track.

Thanks to the factory fit for the specific side and axle of the vehicle, installation is predictable, without the need for modifications or fitting universal replacements.

Benefits of using an original window frame seal

Using an original seal in an Audi allows you to maintain the factory acoustic and performance parameters of the door. In practice, this means:

• better acoustic insulation of the cabin in the rear part of the vehicle,
• smoother window operation in the track, without jamming or excessive play,
• reduced risk of corrosion inside the door due to more effective water drainage,
• consistent appearance of the window edge and frame, in line with the factory body line.

The element from this group is particularly important after body and paint repairs, window replacement, or when leaks and noise appear in the rear right part of the cabin.

Installation characteristics and fitment

The rear right window frame seal has been designed for the specific Audi A4 B8 body, which translates into:

• a profile matched to the shape of the door frame,
• mounting points provided by the manufacturer,
• compatibility with the factory window lifting mechanism.

Such a solution facilitates service work – once properly seated, the element maintains the factory line, and the gaps and window fitment remain consistent with the manufacturer's specifications. This is particularly important for vehicles where maintaining original body parameters is a priority.

Component condition and service application

The offered seal comes from dismantling, which makes it an attractive service solution for users looking for a compromise between cost and maintaining original specifications. This type of component is suitable for:

• eliminating leaks in the rear right door area,
• post-collision repairs involving the side body zone,
• restoring proper window operation after replacing the mechanism or the glass.

Related Audi body components

If you are planning a comprehensive repair or upgrade of the side glazing area in your Audi and need other elements from the same group, such as additional frame seals, window strips, or window guide seals, check the available parts in the Audi window seals and strips category.

For drivers interested in a broader approach to economical vehicle servicing and the use of dismantled parts, the practical tips contained in the article Smart Skoda servicing – why second-hand parts are the best choice for your wallet may be useful, which in many aspects can also be applied to the operation of other brands.