Mercedes X166 Rear Outer Window Weather Strip Seal Right O/S A1667300424

Mercedes X166 Rear Outer Window Weather Strip Seal Right O/S is an original body component designed for precise sealing and aesthetic finishing of the window edge. Thanks to its factory profile and fitment for this specific body generation, it ensures stable window guidance and limits the ingress of water and contaminants into the door interior. This is a practical solution for users looking to restore the proper operation of the rear passenger-side window and maintain a consistent look of the side body line.

Specifications and technical data

• SKU: A1667300424
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667300424
• Substitutable numbers: A1667300424, A 166 730 04 24
• Location on the vehicle: Rear, Right
• Category: Window Seals, Gaskets & Trims

Purpose and function of the component

The presented Mercedes X166 Rear Outer Window Weather Strip Seal Right O/S operates at the contact point between the glass and the door panel, stabilizing its movement in the guides and reducing noise caused by glass vibrations. Its placement on the rear right side of the vehicle allows for targeted replacement of only the worn-out section, without interfering with other sealing elements.

A properly selected seal helps to:

• reduce air drafts at higher speeds,
• limit the ingress of water and dirt into the door interior,
• reduce the risk of accelerated corrosion of the sheet metal edges,
• maintain an even gap between the glass and the outer trim.

Compatibility with the Mercedes X166 body

The seal has been designed specifically for the X166 body type, which means it fits the door geometry, bending radii, and the characteristic side line of this model. The factory profile minimizes the risk of stress during installation and subsequent use, and facilitates proper positioning relative to the glass and door frame.

Thanks to its dedicated design, the user receives a component that works with the factory window lifting mechanism without causing additional resistance or jamming. This is particularly important in vehicles equipped with electric windows, where improper sealing can lead to mechanism strain.

Performance characteristics and installation

The component belongs to the Window seals and trims group, meaning its main task is to combine protective functions with an aesthetic finish of the window edge. Using an original seal allows for maintaining a consistent appearance of the side body, without differences in texture or shape compared to the other trims.

When replacing, it is worth paying attention to:

• proper cleaning of the door edge before installation,
• checking the condition of the guides and the window lifting mechanism,
• even pressure on the seal along its entire length to avoid local leaks.

Such an approach allows for fully utilizing the benefits of the component and limiting the need for further intervention in this area of the body.

Condition and advantages of choosing an original part

The offered seal is an original Mercedes component in used condition, which in practice means the possibility of restoring proper sealing while maintaining factory geometry and material, while simultaneously reducing costs compared to a new element. For many users, this is a reasonable compromise between quality and budget, especially when repairing individual doors.

The original solution ensures:

• compliance with the body styling line,
• predictable performance during operation,
• easier fitment compared to random aftermarket replacements.

Expanding the scope of service work

If you are planning a comprehensive repair or upgrade of the side window area in your Mercedes and need other elements from the same group, such as outer window trims, additional guide seals, or finishing strips, check the available parts in the Mercedes Window seals and trims category.

If you are also considering servicing the drivetrain and are interested in the topic of selecting used OEM components, it is worth reading the guide: Humming differential? Find out why a used OEM drive axle is a better investment than an uncertain replacement, which discusses the practical aspects of choosing original parts from the secondary market.