Audi S4 B9 Window Guide Trim Strip Cover Rear Right O/S 8W9839644A Glossy Black

Audi S4 B9 Window Guide Trim Strip Cover Rear Right O/S Glossy Black is an original body component from the Protective and decorative strips group, designed for the rear right window of the Audi S4 B9 generation. Precise fitment and a glossy black finish ensure a consistent look for the side body line and proper window operation.

Specifications and technical data

• SKU: 8W9839644D
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W9839644D
• Substitutable numbers: 8W9839644A, 8W9 839 644 A, 8W9839644D, 8W9 839 644 D
• Location on the vehicle: Rear, Right
• Part type: Window
• Category: Body Mouldings & Trims

Purpose and function of the component

The rear right window guide trim strip is responsible for stable window guidance within the door and provides an aesthetic finish to the window edge. A properly selected component reduces play, minimizes unwanted noise while driving, and supports the seal between the window and the body. In the case of the Audi S4 B9, this is important for both acoustic comfort and maintaining the characteristic, dynamic side profile.

The glossy black finish is particularly important in versions with a sports styling package, where body details must be color-matched and visually consistent with other decorative elements.

Construction and fitment for Audi S4 B9

The trim strip has been designed as a component dedicated to a specific model, ensuring:

• proper fitment to the rear right part of the body,
• correct geometry for window guidance in the rail,
• compatibility with the factory window lifting mechanism,
• visual consistency with other trim strips and window frames.

As a part from the Protective and decorative strips group, the component serves both a functional and aesthetic purpose – it protects the edge of the glass and masks mounting gaps, improving the visual perception of the entire rear body section.

Product characteristics and condition

The offered trim strip is a used component, which in practice means it comes from vehicle dismantling and retains its factory construction and original mounting points. This type of part is a good choice for accident repairs, replacing a damaged guide, or restoring full functionality to the window mechanism after wear and tear.

Choosing an original window guide trim strip reduces the risk of assembly problems, improper window closing, or differences in finish shade compared to other body components.

Benefits of using an original guide trim strip

Using a dedicated trim strip in the Audi S4 B9 brings a number of practical benefits:

• Stable window guidance – reduction of vibrations and unwanted play while driving.
• Better sealing – proper window adhesion to the seals helps maintain acoustic comfort.
• Consistent body appearance – glossy black finish matched to the factory finish of other strips.
• Reduced risk of assembly problems thanks to the retention of the component's factory geometry.

Complementary components and technical knowledge

If you are planning a comprehensive repair or upgrade of the side window area in your Audi and need other components from the same group, such as covers, overlays, or additional strips, check out the available parts in the Audi protective and decorative strips category.

When working with used body and equipment components, it is worth knowing the best practices for selecting parts from dismantling – especially for elements affecting vehicle safety or system operation. In this context, a guide material devoted to the fuel system may be helpful, discussing how to consciously choose used components: Fuel dosing problems: what to look for when buying a used injection pump and fuel rails?.

If you care about maintaining the brand's characteristic DNA and want to better understand how original, used components affect the perception of the car, it is also worth reading the article: Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?.

Summary

Audi S4 B9 Window Guide Trim Strip Cover Rear Right O/S Glossy Black is a practical choice for repairing or refreshing the side body section of the S4 B9 model. The original construction, dedicated vehicle placement, and aesthetic glossy black finish help restore proper window operation and maintain the consistent look of the Audi sports sedan.