Tailgate Window Audi A4 S4 B9 Rear Boot Trunk Lid Glazing AS3 8W9845501C

Tailgate Window Audi A4 S4 B9 Rear Boot Trunk Lid Glazing AS3 is an original component from the Car windows group, designed for installation in the rear part of the vehicle body. This used tailgate window is a practical solution for drivers who want to maintain the factory body geometry, proper structural rigidity, and correct fitment with seals and hinges.

Specifications and technical data

• SKU: 8W9845501C
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W9845501C
• Substitutable numbers: 8W9845501C, 8W9 845 501 C
• Location on the vehicle: Rear
• Category: Car Glass

Purpose and function of the tailgate window

The tailgate window in the Audi A4 / S4 B9 is responsible not only for rear visibility but also for stiffening the tailgate structure and ensuring the tightness of the entire luggage compartment area. A properly selected component ensures:

• correct cooperation with the tailgate frame and hinges,
• proper adhesion to seals and trim strips,
• stable mounting of accessories (e.g., elements mounted on the edge of the glass),
• preservation of the factory body line and the aesthetics of the vehicle's rear.

By using an original window from disassembly, you maintain the structural integrity of the body and preserve the parameters specified by the manufacturer.

Benefits of using an original Audi window

Choosing an original tailgate window for the Audi A4 / S4 B9 is a solution that allows you to avoid problems typical of aftermarket replacements. A component from the same production series as the factory equipment ensures:

• precise fit to the tailgate contours and factory mounting points,
• consistent appearance with the vehicle's other windows (shade, structure, glass type),
• preservation of the performance characteristics specified by the manufacturer,
• easier installation without the need for additional modifications.

For users who value original solutions, this is a technically safe way to replace a damaged window while maintaining high manufacturing quality.

Vehicle placement and installation aspects

The presented window is intended for installation in the rear part of the vehicle, within the tailgate area. Proper placement on the vehicle is crucial for:

• correct closing of the tailgate and operation of the lock,
• maintaining tightness against water and contaminants,
• safe vehicle operation thanks to proper rear visibility.

The replacement of the tailgate window should be carried out using dedicated installation materials and in accordance with the manufacturer's procedure, which allows for maintaining the durability of the connection and operational safety.

Condition of the component and practical application

The offered tailgate window is a used component, which represents a favorable compromise between repair costs and maintaining original quality. This type of solution works particularly well in the case of:

• post-accident repairs in the rear part of the body,
• window replacement after cracking or mechanical damage,
• restoring the vehicle to a state close to factory condition after previous modifications.

By choosing a used window from the Car windows group, you reduce service costs while maintaining the parameters intended for the specific Audi model.

Repair expansion and additional information

If you are planning a comprehensive repair or modernization of the rear body area in your Audi and need other elements from the same group, such as additional side windows, door windows, or other glazing, check the available parts in the Audi car windows category.

When selecting used glass components, it is worth following proven sources and knowledge about original components. To better understand how to effectively choose used components for popular car models, check out the guide: The best used car parts – a guide to the most frequently chosen original parts.