Audi A3 8P Rear Door Trim Aperture Strip Right O/S Outer Seal Gasket 8P4839478A

Visual condition of the part 

The product shows signs of use visible in the photos. 

Audi A3 8P Rear Door Trim Aperture Strip Right O/S Outer Seal Gasket is a precision body component from the Door seals group, designed specifically for the rear right side of the vehicle. It is responsible for effectively draining water from the window and ensuring stable guidance within the channel, which reduces noise, vibrations, and the risk of moisture entering the interior. This is a practical solution for users who want to restore proper window operation and maintain the factory door seal integrity.

Specifications and technical data

• SKU: 8P4839478A-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8P4839478A
• Substitutable numbers: 8P4839478A, 8P4 839 478 A
• Location on the vehicle: Rear, Right
• Category: Door Seals

Purpose and technical function

The window scraper seal mounted on the rear right door of the Audi A3 8P is responsible for contact with the window surface during raising and lowering. It creates a barrier against water, dirt, and fine debris that could otherwise penetrate the interior of the door and the cabin. Thanks to its appropriately selected profile and structural rigidity, it supports correct window guidance, which translates into stable operation of the lifting mechanism.

This component is particularly important in vehicles operated in variable weather conditions, where frequent contact with water, salt, and road dust accelerates the wear of seals. Replacing a worn scraper seal with a functional component helps reduce window fogging, decrease cabin noise, and minimize the risk of corrosion inside the door.

Benefits of using an original Audi strip

Using a scraper seal dedicated to a specific body model ensures:

• precise fit to the shape of the rear right window and door frame,
• proper pressure against the glass surface, which improves the tightness of the system,
• stable cooperation with the factory window lifting mechanism,
• reduction of water and dirt ingress into the door interior.

As a result, acoustic comfort in the cabin remains at an appropriate level, and internal door components – such as electrical harnesses or mechanisms – are better protected against moisture. A properly selected scraper seal also helps maintain stable window guidance, which reduces mechanical loads and can extend the service life of the window regulator.

Assembly and operational characteristics

The strip is designed for installation in the rear right part of the body, which eliminates the need for adjustments or shape modifications. The design provided by the vehicle manufacturer allows for seating the element in factory mounting points, while maintaining the correct geometry relative to the window and door frame. This solution is particularly beneficial for post-accident repairs or when replacing worn seals after many years of operation.

The product comes from the group of components used as factory equipment in Audi vehicles, which helps maintain the visual and technical consistency of the entire door system. Choosing such a component is a good solution for users who want to maintain the original character of the vehicle and avoid problems with inaccurate fitment or excessive window wear due to improper pressure.

Use in service and body restoration

Replacing the scraper seal is recommended in situations where cracks, deformations, or clear signs of wear appear on the sealing surface, as well as when the window operates with noticeable resistance or leaks occur during rainfall. Using a dedicated element for the rear right door allows for restoring proper window operating conditions and reducing the risk of further mechanical and corrosive damage within the door area.

If you are planning a comprehensive repair or modernization of the door zone in your Audi and need other elements from the same group, such as additional scraper strips, perimeter seals, or lower threshold seals, check the available parts in the Audi door seals category.

Product condition and part selection

The offered scraper seal is an aftermarket component, which is a beneficial solution for users looking for a reasonable compromise between repair costs and maintaining the original vehicle construction. Before installation, standard visual verification and comparison of the shape and mounting method with the element removed from the car are recommended to confirm full compatibility.

For drivers considering the choice between new and used components, comparative material may be helpful – more information can be found in the article New or used? A comparison of costs and quality of car parts, which discusses the differences in costs, durability, and cost-effectiveness of using aftermarket parts.