Volkswagen VW Jetta A6 Winow Guide Seal Gasket Rubber Rear Left N/S 5C6839431

The Left Rear Window Regulator Seal for Volkswagen Jetta A6 is an original part from the window seals and trim category, designed for installation on the rear left side. It ensures a tight window seal, reduces wind noise, and supports the proper functioning of the window lifting mechanism in the sixth-generation Jetta body.

Specifications and technical data

• SKU: 5C6839431
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 5C6839431
• Substitutable numbers: 5C6839431, 5C6 839 431
• Location on the vehicle: Rear, Left
• Part type: Window Seal
• Category: Window Seals, Gaskets & Trims

Purpose and Function of the Window Regulator Seal

The presented left rear window regulator seal for Volkswagen Jetta A6 is responsible for the stable guidance of the window within the door frame and for limiting the ingress of water, dust, and noise into the vehicle's interior. The component works in direct contact with the window, making its correct shape and flexibility crucial for smooth window movement and even pressure against the door frame.

Its placement on the vehicle is rear – left side, allowing for precise fitting to the specific mounting position in the Jetta A6 body. This ensures factory-level alignment with the door frame, and the window moves in a predictable, controlled manner, without excessive play or unwanted vibrations.

Construction, Material, and Fit for Volkswagen Jetta A6

The seal is made from a carefully selected rubber compound that combines resistance to atmospheric conditions with the flexibility needed for proper sealing around the window perimeter. The rubber profile is designed to work with the factory door frame of the Jetta A6 and the standard window lifting mechanism.

Original origin from the Volkswagen Group means:

• geometry consistent with the factory design – no need for modifications or forceful fitting,
• consistency with the body line – the seal does not protrude or deform when properly installed,
• compatibility with factory mountings – original mounting points in the door are maintained.

This allows the part to be used both as a replacement for a worn-out seal and in post-accident repairs, where restoring the original sealing and functionality of the rear left door is necessary.

Benefits of Using an Original Left Rear Seal

Using a dedicated window regulator seal in the Volkswagen Jetta A6 translates into a number of practical operational benefits:

• Reduced cabin noise – proper adhesion of the rubber to the window and door frame reduces wind noise at higher speeds.
• Better protection against moisture – correct sealing reduces the risk of water entering the door and cabin.
• Stable window guidance – the window moves along its intended path, reducing the load on the lifting mechanism.
• Maintenance of factory comfort – the original window operation characteristics and the aesthetics of the vehicle's side profile are preserved.

A component from this category is particularly important in vehicles operated in variable weather conditions, where the rubber is exposed to UV radiation, temperature fluctuations, and road contaminants. Replacing a worn-out seal with an original component allows for the restoration of predictable window behavior and acoustic comfort inside the cabin.

Condition, Installation, and Practical Application

The offered window regulator seal is a used part, which in practice means a favorable combination of original origin with an attractive price compared to a new component. For many Jetta A6 owners, this is a sensible solution for routine repairs, especially when the goal is to restore proper window operation and door sealing without excessive budget strain.

During installation, it is recommended to:

• thoroughly clean the door recess before fitting the seal,
• check the condition of the guides and the window lifting mechanism to avoid accelerated wear,
• test the window operation after installation – a full up/down cycle to verify smooth movement and sealing.

This approach allows for the full utilization of the original seal's potential and ensures stable operation of the entire left rear window system.

Other Window Seals and Trim for Volkswagen and Knowledge about Used Parts

If you are looking for other window seals and trim for Volkswagen, check availability in the dedicated category: Volkswagen Window Seals and Trim. There you will find a wide selection of rubber parts and trim pieces suitable for various models of this brand.

You can read more about how to consciously use second-hand components in cars from the years 1998–2012 in the article: Second Life for Youngtimers – How Used Car Parts Revitalize Cars from 1998–2012. This is a practical source of knowledge for Volkswagen owners and other brands planning rational repairs and upgrades based on used parts.