Audi A4 B8 Avant Door Window Seal Rear Right O/S Guide Frame Gasket 8K9839440

Audi A4 B8 Avant Door Window Seal Rear Right O/S Guide Frame Gasket is a precisely fitted body component designed for the rear right window of the estate version. It is responsible for the tight seating of the window in the door frame, improving acoustic insulation, water protection, and glass stability. This is a practical solution for users who want to restore the factory comfort and sealing parameters in their Audi.

Specifications and technical data

• SKU: 8K9839440
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K9839440
• Substitutable numbers: 8K9839440, 8K9 839 440
• Location on the vehicle: Rear, Right
• Part type: Window Seal
• Category: Window Seals, Gaskets & Trims

Purpose and function of the window frame seal

The presented seal is a component from the Window seals and trims group, dedicated to the rear right part of the body. Its task is to create a tight connection between the glass and the door frame, which limits the ingress of water, dust, and noise into the vehicle interior. A properly selected seal stabilizes the glass in the guide, reduces the risk of rattling and vibrations, and supports the correct operation of the window lifting and lowering mechanism.

Benefits of using an original Audi seal

Using an original component intended for a specific Audi model allows for maintaining factory fitment and door frame geometry. Thanks to this:

• acoustic comfort inside the vehicle is increased,
• the risk of water leaks in the rear window area is limited,
• the correct operation of the rear door window mechanism is maintained,
• the bodywork handles daily use and temperature changes better.

This is particularly important in cars used daily, where stability and tightness of the rear body section affect passenger comfort and the protection of the trunk upholstery and rear seats.

Component characteristics and installation

The rear right window frame seal is profiled for the specific shape of the Audi A4 B8 Avant door, which facilitates installation and ensures proper adhesion to the bodywork and the glass. The component is intended for placement in the rear right part of the vehicle, therefore it should not be used interchangeably with seals from other sides or axles of the car. Proper fitment translates into:

• secure seating in factory mounting points,
• even pressure around the entire circumference of the glass,
• reduced risk of deformation during operation.

The product comes from dismantling, which means it is an original used component, maintaining the construction and shape intended by the vehicle manufacturer.

Application in body service and repairs

The rear right window frame seal will work well both for local repairs after a collision and for gradual body restoration when existing seals are worn, brittle, or leaking. Replacing this component is recommended, among other situations, when there are:

• air noise at higher speeds in the rear window area,
• traces of moisture on the door upholstery or panels,
• play of the glass in the guide or incorrect operation of the lifting mechanism.

By using a dedicated seal, you can restore the factory level of tightness and comfort without the need to interfere with the door structure.

Expanding the scope of repairs – Audi window seals and trims

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

To better plan service work on other vehicles in your fleet or workshop, you can also reach for practical tips regarding the operation and selection of engine components – you will find them in the article Reliability under the star sign – how to take care of engine equipment in popular Mercedes-Benz C and E-Class models?, which discusses the importance of using proven parts in daily operation.