Audi A4 B9 Rear Quarter Window Triangle Glass Right Side O/S AS2 8W5845298H

Audi A4 B9 Rear Quarter Window Triangle Glass Right Side O/S AS2 is an original body component from the Car windows category, designed for installation on the right rear side of the vehicle. It ensures proper body rigidity, correct visibility, and stylistic consistency with the other windows in your Audi. This is a solution for users who expect precise fitment and the maintenance of factory safety parameters.

Specifications and technical data

• SKU: 8W5845298H
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W5845298H
• Substitutable numbers: 8W5845298H, 8W5 845 298 H
• Location on the vehicle: Rear, Right
• Part type: Rear Quarter Window
• Category: Car Glass

Purpose and function of the quarter window

The Audi A4 B9 rear quarter window on the right side operates in a critical area of the bodywork, combining the function of a side glass panel with the role of a structural stiffening element. It is responsible for:

• a stable connection between the rear part of the body and the roofline and side pillars,
• maintaining the correct body geometry in the rear zone,
• ensuring adequate visibility for rear-seat passengers,
• reducing noise and airflow thanks to proper sealing. By maintaining the factory shape and glass characteristics, the rear quarter window allows the vehicle to be restored to the manufacturer's specifications without compromising the fitment to the window frame.

Technical parameters and Audi fitment

The presented glass belongs to the Car windows category and is dedicated to installation in the rear, right side of the body. The AS2 marking indicates the appropriate light transmission class and compliance with standards used in side glazing for passenger vehicles. The glass construction is optimized for:

• safe distribution of stress within the body frame,
• compatibility with factory seals and mounting strips,
• maintaining proper rigidity in the rear side glazing area. Its original Audi origin facilitates trouble-free installation and minimizes the risk of leaks or improper alignment with body components.

Performance characteristics and benefits of installation

Using this glass in an Audi A4 B9 allows for the restoration of full functionality to the rear right side of the body after mechanical damage or a collision. Key advantages include:

• factory fitment to the body lines and contours,
• visual consistency with the vehicle's other windows,
• maintenance of proper interior acoustic insulation,
• preservation of the original optical characteristics of the glass. For body shops and service centers specializing in the Audi brand, this is a component that allows for a technically correct reconstruction of the side body section without the need to modify the window frame or mounting points.

Application in Audi body repairs

Replacing the rear right quarter window is a typical operation following side damage, hail, or vandalism. In service practice, installing an original component reduces the time required for fitting and adjustment, which translates into a stable final result. The product is suitable for both post-accident repairs and body restoration, where maintaining the factory glazing line is crucial. If you are planning a comprehensive repair or upgrade of your Audi's bodywork and need other elements from the same group, such as side door windows, triangle windows, or additional glazing, check out the available parts in the Audi car windows category.

Why choose original used parts for premium cars

In the current market situation, original used components for premium brands such as Audi represent a reasonable compromise between quality and repair costs. They allow for the preservation of the vehicle's factory parameters while limiting expenses associated with replacing body parts. If you want to better understand why the secondary market for OEM parts for high-end cars is growing dynamically and how to consciously choose such components, read the article Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026.