Volkswagen Passat B8 Rear Door Window Frame Seal Top Strip Left N/S 3G9839432AK

Volkswagen Passat B8 Rear Door Window Frame Seal Top Strip Left N/S is an original component from the Window seals and trims group, designed for installation in the rear left section of the vehicle body. The precisely formed sealing frame ensures stable window guidance, limits water ingress and noise, and helps maintain the proper rigidity of the door edge, which translates into daily driving comfort.

Specifications and technical data

• SKU: 3G9839431AK
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 3G9839431AK
• Substitutable numbers: 3G9839431AK, 3G9 839 431 AK
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and function in the bodywork

The presented window frame seal is dedicated to the rear left part of the body in the Passat B8 model. The component works in direct contact with the glass and the door panel, creating a flexible barrier between the interior and the external environment. Thanks to the properly selected profile geometry, the seal supports:

• limiting air drafts at higher speeds,
• reduction of wind noise in the cabin,
• control of water drainage from the window frame area,
• stable guidance of the window edge in the guide rail.

Such a fit is particularly important in upper-mid-range cars, where a balanced level of acoustic comfort and body tightness is expected.

Original Volkswagen manufacturing

The window frame seal comes from the Volkswagen line, which means maintaining factory geometry, compound hardness, and mounting points. Original manufacturing translates into:

• secure fitment with the door edge and frame structure,
• proper cooperation with the window lifting mechanism,
• compatibility with factory door trim elements.

As a result, installation is predictable, without the need for modifications or profile adjustments, which is a common problem with aftermarket parts of imprecise dimensions.

Installation and performance characteristics

The seal is prepared for operation in the rear left body zone, where it is exposed to variable thermal loads, moisture, and window movement. The component's design is engineered to:

• maintain stable pressure against the glass along the entire frame perimeter,
• retain flexibility within the typical operating temperature range,
• reduce the risk of squeaking and rattling during door opening and closing.

The choice of material and profile shape promotes even pressure distribution, which helps maintain tightness over a long period of use while ensuring the correct operation of the window mechanism.

Condition of the item and benefits of choosing a used OEM part

The offered seal is in used condition, which in practice means it comes from vehicle dismantling and retains the manufacturer's factory specifications. In the case of components such as window frame seals, choosing an original used part often allows for a better fit than many new aftermarket replacements, while simultaneously reducing service costs. For users who want to learn more about the subject of original components from dismantling, a guide has been prepared – more information can be found in the article on the advantages of used original OEM parts.

Support with selection and expansion of the sealing zone

If you are planning a comprehensive repair or upgrade of the side glazing zone in your Volkswagen and need other elements from the same group, such as additional frame seals, trim strips, or window guide seals, check the available parts in the Volkswagen window seals and trims category.