Audi A6 C6 Rear Left N/S Rubber Seal Gasket Window Frame Guide Rail 4F9839439M

Audi A6 C6 Rear Left N/S Rubber Seal Gasket Window Frame Guide Rail is an original Audi body component designed for installation in the rear left section of the vehicle. It ensures tight window guidance, stabilizes its operation within the rail, and limits the ingress of water and noise into the cabin, which translates into a more comfortable and predictable vehicle operation.

Specifications and technical data

• SKU: 4F9839439R
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F9839439R
• Substitutable numbers: 4F9839439R, 4F9 839 439 R, 4F9839439M, 4F9 839 439 M
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and function in the Audi A6 C6

The presented seal belongs to the Window seals and trims category and is tailored to the rear left body section of the Audi A6 C6 generation. It is responsible for:

• guiding the window within the door frame and maintaining it in the correct operating position,
• reducing vibrations and rattling of the window while driving,
• sealing the contact point between the window and the door frame in the guide rail area.

Thanks to its proper profile and fitment for the specific model, this component works in harmony with the factory window lifting mechanism, supporting smooth opening and closing of the window.

Benefits of using an original seal

Using an original Audi A6 C6 window frame guide rail seal offers a number of practical advantages:

• Factory geometric fit – no modifications required, proper adhesion to the door frame and window.
• Stable window operation – reduction of play in the guide rail and improvement of the lifting mechanism's performance.
• Better interior protection – reduced risk of moisture and contaminants entering the door area.
• Consistency with other body components – maintaining the original operating characteristics of the windows throughout the vehicle.

Installation characteristics

The seal is designed for installation in the rear left part of the vehicle, which facilitates clear identification of the installation location. The design provided by the manufacturer allows for installation in place of the factory component, while maintaining the original window guidance line and compatibility with the existing door frame.

When replacing, it is recommended to thoroughly clean the mounting slot in the door and check the condition of the window lifting mechanism to fully utilize the properties of the newly installed seal.

Condition and service application

The item comes from the used parts group, which makes it an attractive solution for servicing vehicles where a reasonable repair cost is important while maintaining the original manufacturer's specifications. This type of component is particularly useful for:

• eliminating leaks in the rear left window area,
• repairs after side collisions,
• door restoration and restoring proper window mechanism operation.

If you are planning a comprehensive repair or upgrade of the side glazing zone in your Audi and need other elements from the same group, such as guides, perimeter seals, or trim strips, check the available parts in the Audi Window seals and trims category.

Additional information and knowledge development

For those interested in a broader context of selecting used parts, upgrades, and the impact of individual components on vehicle operation, an article describing the evolution of popular model designs and their sub-assemblies may be helpful – you can find it here: Hot-hatch legend: the evolution of the VW Golf GTI from Mk1 to Mk8 – design changes and VW car parts.