Audi A4 B8 Window Guide Seal Door Frame Gasket Rubber Rear Right O/S 8K5839440E

The Rear Right Door Window Regulator Seal for Audi A4 B8 is an original part from the Window Seals and Trim group, designed for installation in the rear right part of the body. It ensures stable window guidance within the door frame, reduces wind noise, and helps maintain proper sealing between the window and the door, contributing to acoustic comfort and vehicle interior protection.

Specifications and technical data

• SKU: 8K5839440E
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K5839440E
• Substitutable numbers: 8K5839440E, 8K5 839 440 E
• Location on the vehicle: Rear, Right
• Part type: Window Seal
• Category: Window Seals, Gaskets & Trims

Application and Body Function

This window regulator seal is specifically designed for the rear right side of the Audi A4 B8 generation body. It is responsible for the correct guidance of the window within the door frame and for maintaining even pressure of the window against the perimeter seal. This prevents water, dust, and air drafts from entering the cabin, and also reduces unwanted window vibrations during driving.

Construction and Fit for Audi A4 B8

This part is manufactured as an original Audi component, ensuring a precise fit to the door frame shape and factory mounting points. The rubber profile is specifically shaped for operation within the window regulator channel, in order to:

• maintain the window's alignment during raising and lowering,
• ensure even contact along the entire edge length,
• reduce friction and wear on the window lifting mechanism.

This precise fit promotes the preservation of the factory-standard operation of the window mechanism and minimizes the risk of jams or misalignment.

Benefits of Using an Original Seal

Using an original window regulator seal for the Audi A4 B8 offers a number of practical benefits. The most important include:

• Stable Window Operation – proper guidance reduces lateral play and improves cooperation with the window regulator.
• Improved Door Sealing – correct window pressure against the frame reduces cabin noise and the risk of leaks.
• Compatibility with Factory Components – no need for modifications or shape adjustments.
• Visual Consistency – maintaining a uniform seal line along the entire door edge.

Condition and Service Application

This seal is a used part, sourced from a dismantled vehicle, and offered as a pre-owned component. It is a sensible solution for routine maintenance repairs or post-collision repairs. It is particularly useful in situations where the existing window regulator channel is deformed, aged, or causing improper window operation, such as jamming, excessive noise when closing, or leaks at the top of the door frame.

Selecting the Correct Seal and Purchase Support

To correctly select the window regulator seal for your specific Audi A4 B8 version, it is advisable to verify compatibility using the OEM number or replacement numbers and to confirm its placement on the vehicle (rear, right side). A detailed guide on selecting parts by number, available in the article Guide: How to Select the Right Car Part by VIN and OEM Number, can be helpful, as it describes step-by-step how to verify compatibility.

If you are planning a comprehensive repair or upgrade of the window sealing area in your Audi and require other parts from the same group, such as regulators, door frame seals, or trim strips, please check the available parts in the Audi Window Seals and Trim category.

Summary

The Rear Right Door Window Regulator Seal for Audi A4 B8 is a practical choice for repairing the window system in the rear right part of the body. Its original Audi origin ensures precise fitment, and its design, tailored to the specific model, helps restore proper window operation, improve door sealing, and enhance acoustic comfort inside the vehicle.