Mercedes X166 Door Window Frame Rail Seal Rubber Rear Right O/S A1667350425

Mercedes X166 Door Window Frame Rail Seal Rubber Rear Right O/S is a precision body component designed for the rear side area on the passenger side. As part of the Window seals and trims group, it is responsible for sealing, noise reduction, and stable window guidance within the door frame. Using this original component ensures factory-fitment and a consistent appearance for the side of the vehicle body.

Specifications and technical data

• SKU: A1667350425
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667350425
• Substitutable numbers: A1667350425, A 166 735 04 25
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and function of the component

The described Mercedes X166 Door Window Frame Rail Seal Rubber Rear Right O/S is dedicated to the X166 body type and is mounted in the rear part of the vehicle on the right side. It is responsible for:

• sealing the window perimeter within the door frame,
• stable window guidance during raising and lowering,
• preventing water and contaminants from entering the door interior,
• reducing wind noise in the rear cabin area.

By maintaining the correct profile and flexibility, the seal supports the proper operation of the window regulator mechanism and helps maintain acoustic comfort inside the vehicle.

Construction and fitment to the Mercedes X166 body

The window frame seal has been designed specifically for the geometry of the rear doors in the X166 body, which translates into a precise fit against the frame edge. The properly shaped profile works with the sheet metal edge and the glass, ensuring even pressure along the entire perimeter.

The original Mercedes origin means maintaining factory dimensional tolerances, which facilitates installation and minimizes the risk of leaks. Using this component allows for an economical repair while maintaining compliance with the door structure and the side line of the body.

Benefits of using an original window frame seal

Using this seal in the rear right part of the vehicle helps restore proper sealing and comfort of use. Key advantages include:

• Factory fitment to the door frame – no need for modifications or profile adjustments.
• Stable window operation in the guide, which reduces the risk of jamming and excessive play.
• Improvement of acoustic comfort in the rear cabin thanks to better sealing.
• Aesthetic finish of the window edge and door frame, consistent with other body elements.

Choosing an original seal from the Window seals and trims group is particularly beneficial for post-collision repairs, door replacements, or when experiencing increased noise and leaks in the rear part of the vehicle.

Product condition and service application

The item is offered in a used condition, which allows for a cost-effective restoration of the rear right window area's functionality. This type of seal is suitable both for replacing a damaged or deformed component and for comprehensive rear door renovation, where it is necessary to restore proper sealing and window guidance.

Expanding repairs within Mercedes seals and trims

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 additional frame seals, trim strips, or window guides, check the available parts in the Mercedes Window seals and trims category.

Tips for economical operation

When planning body and window component repairs, it is worth paying attention to the selection of original or equivalent quality parts to reduce the risk of repeated service interventions. Additional tips on optimizing mechanical and body repair costs can be found in the article Economical operation of a Ford – where to look for the greatest savings in mechanical and body repairs, the advice of which can largely be applied to other brands as well, including Mercedes vehicles.