Audi A5 8T Rear Inner Seal Rubber Gasket Left N/S 8T8839479E

Audi A5 8T Rear Inner Seal Rubber Gasket Left N/S is a precision body component responsible for effectively draining water from the window surface and reducing noise and vibrations. Thanks to its factory fit for the rear left window of the Audi A5 8T, it ensures stable window operation, improved sealing, and an aesthetic finish to the window edge. This is a practical solution for users who want to restore the proper functioning of the window mechanism and the acoustic comfort of the cabin.

Specifications and technical data

• SKU: 8T8839479E
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T8839479E
• Substitutable numbers: 8T8839479E, 8T8 839 479 E, 8T8839479D, 8T8 839 479 D
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Function and application of the window seal

The presented seal belongs to the Window seals and trims group and is designed for installation on the rear left window of the Audi A5 8T generation. Its task is to mechanically scrape water, mud, and small debris from the window surface during raising and lowering, which reduces the risk of scratches and accelerated glass wear. Additionally, this component stabilizes the window in the guide, reducing play and unwanted vibrations while driving.

A properly selected window seal also affects acoustic comfort – it reduces wind noise and minimizes moisture ingress into the door interior. In the case of wear of the original seal, typical symptoms appear, such as noisier window operation, squeaking during window movement, or visible water streaks on its surface. Replacing it with a functional component allows for restoring the proper operation of the entire system.

Compatibility with Audi A5 8T

The seal has been designed specifically for Audi A5 8T models, taking into account the geometry of the rear left window and the door structure. This means that the shape, length, and working profile are matched to the factory mounts, which facilitates installation and ensures proper adhesion to the glass and door panel. The lack of need for modifications or forced fitting translates into safer operation and a lower risk of leaks.

Thanks to the use of an original Audi solution, structural consistency with other body elements is maintained. This is particularly important for vehicles where not only appearance matters, but also proper door rigidity, correct window guidance, and proper cooperation with the lifting mechanism.

Component characteristics and installation benefits

The inner window seal works in a demanding environment – it is exposed to temperature changes, moisture, UV radiation, and constant contact with the glass. Using an original Audi component allows for maintaining the appropriate flexibility and elasticity of the material, which translates into even pressure against the glass along its entire length. This, in turn, supports smooth window movement and limits point wear.

The main benefits of using this component include:

• improved sealing of the rear left window and reduction of water ingress into the door interior,
• noise reduction in the cabin through better sealing of the window edge,
• protection of the glass surface against scratches resulting from contact with dirt,
• stabilization of the window in the guide, which affects the smoothness of the lifting mechanism.

Practical installation tips

When replacing the window seal, it is recommended to remove the door trim to gain convenient access to the mounts. It is worth thoroughly cleaning the door edges and window guides from accumulated dirt so that the new component works in the best possible conditions. A properly seated seal should adhere evenly along its entire length, without waving or excessive tension.

Due to the specific location on the vehicle (rear, left side), it is important not to swap it with elements intended for other positions on the body. Maintaining the correct installation direction and matching the factory clips guarantees full functionality and durability in daily use.

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

For drivers interested in a broader perspective on the use of used components in VAG group cars, an article describing when choosing second-hand parts is most cost-effective may be helpful – you can find it here: Volkswagen – solidity and reliability. Why are used VW parts a reasonable choice?.