Audi A4 B8 Front Door Window Guide Rail Gasket Rubber Right O/S 8K0837440F

Audi A4 B8 Front Door Window Guide Rail Gasket Rubber Right O/S is an original body component from the Window seals and trims group, designed for installation on the front right side. Thanks to its factory-fit design, it ensures smooth window guidance, stable seating in the door, and an aesthetic edge finish. This is a practical solution for Audi owners looking to restore proper window operation and maintain a consistent appearance of the vehicle's side profile.

Specifications and technical data

• SKU: 8K0837440F
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0837440F
• Substitutable numbers: 8K0837440F, 8K0 837 440 F, 8K0837440E, 8K0 837 440 E, 8K0837440J, 8K0 837 440 J
• Location on the vehicle: Front, Right
• Category: Window Seals, Gaskets & Trims

Purpose and function of the component

The presented sealing trim is dedicated to the front right door, where it is responsible for guiding the window and limiting the ingress of water and contaminants into the door interior. The design, matched to the geometry of the Audi A4 B8 body, allows for:

• maintaining a stable window position during raising and lowering,
• reducing cabin noise by better sealing the area around the window,
• protecting the window regulator mechanism from excessive dirt.

Thanks to the use of the original mounting profile, the trim works with the factory door mounts, which facilitates service and reduces the risk of improper fitment.

Construction and fitment for Audi

The window guide rail gasket has been designed specifically for the Audi body, taking into account the characteristic side line and the shape of the door frame. The appropriately selected stiffness and flexibility of the material allow for:

• secure adhesion to the window edge along its entire length,
• compatibility with the factory window lifting mechanism,
• maintaining the correct sealing geometry in the front part of the body.

The original origin from the Audi brand means that the component was designed according to the vehicle manufacturer's standards, which translates into predictable performance in operation and easier diagnostics of potential leaks.

Condition, origin, and mounting parameters

The item is offered as a used part, which allows for economical repair while maintaining factory fitment. The placement on the vehicle, defined as front – right, clearly indicates the side of installation, minimizing the risk of error when selecting the component.

An additional advantage is the presence of the OEM part number and related interchangeable numbers (visible in the technical specification), which facilitates verification of compatibility with a specific equipment version and model year. This allows for precise selection of the trim for your Audi A4 B8, without the need to use aftermarket replacements with uncertain fitment.

Benefits of using the original sealing trim

Using the original window guide rail gasket in an Audi A4 B8 brings a number of practical benefits in daily operation:

• more stable window operation in the guide rail,
• reduction of air drafts and noise at higher speeds,
• better protection of the door interior against moisture,
• maintaining a consistent appearance of the side body line.

For workshops and individual users, this means faster installation, fewer corrections, and a predictable end result after replacing the component.

Part selection and additional materials

To verify compatibility even more precisely, you can use the SKU marking and the OEM part number visible in the specification section. The presence of interchangeable numbers, marked as reference numbers, makes it easier to match the trim to different production variants within the same model generation.

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

For drivers interested in a broader vehicle modernization – including the drivetrain – the guide on choosing and operating transmissions may be helpful, available in the article Transmission: manual, automatic, or DSG – common faults and a guide to buying a used gearbox, which allows for better planning of future repairs and investments in the car.