Audi S3 8Y Sportback Rear Door Inner Window Gasket Rubber Left N/S 8Y0839479

Audi S3 8Y Sportback Rear Door Inner Window Gasket Rubber Left N/S is an original body component from the Window seals and trims group, designed for installation on the rear left side of the vehicle. It ensures a tight window guide, reduces wind noise, and helps maintain stable acoustic and thermal conditions inside the car.

Specifications and technical data

• SKU: 8Y0839479
• Mark: Audi
• Condition: Used
• OEM Part Number: 8Y0839479
• Substitutable numbers: 8Y0839479, 8Y0 839 479
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and function of the seal

The presented rear left inner window gasket for the Audi S3 8Y Sportback is responsible for proper sealing of the window against the door frame. This component:

• stabilizes the window in the guide during raising and lowering,
• limits the ingress of water and moisture into the door interior,
• reduces wind noise at higher speeds,
• supports the maintenance of cabin acoustic comfort.

Thanks to its fitment for the specific Sportback body model, the seal works in harmony with the factory door construction, which translates into proper fitment and stable window operation.

Original origin and fitment

The seal comes from the Audi range, which means it maintains factory geometry, the appropriate rubber compound hardness, and compatibility with the door line of the S3 8Y version. Original manufacturing allows for:

• installation in place of the factory seal without modifications,
• maintaining the original window-to-frame contact line,
• preserving visual consistency with other trim elements.

Such a solution is particularly beneficial for post-accident repairs or when replacing worn-out parts, where maintaining factory body parameters is a priority.

Installation characteristics

The seal is designed for installation in the rear, left zone of the body, on the inner side of the door. The design, tailored to the specific position on the vehicle, facilitates correct seating in the channel and minimizes the risk of leaks resulting from improper installation. When replacing, it is recommended to:

• thoroughly clean the mounting channel in the door,
• check the condition of the window regulator mechanism,
• verify window adhesion after installation is complete.

This approach allows for fully utilizing the component's potential and ensuring stable, repeatable window operation over a long service life.

Component condition and service application

The offered seal is a used part, making it an attractive cost-effective alternative to a new part while maintaining the manufacturer's original specifications. It is suitable for both routine repairs (replacing a worn or damaged seal) and bodywork/paint jobs following interference with the door structure.

Complementary Audi window seals and trims

If you are planning a comprehensive repair or upgrade of the side glazing area in your Audi and need other components 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.

If you are considering a wider range of service work within the drivetrain and are interested in when it is worth choosing used OEM components instead of uncertain replacements, the following article may be helpful: Humming differential? Why a used OEM drive axle is often a better choice.