Audi A4 S4 B9 Door Window Glass Rear Left N/S Side Tinted AS3 8W5845205A

Audi A4 S4 B9 Door Window Glass Rear Left N/S Side Tinted AS3 is an original component from the Car windows category, designed for installation in the rear left door. The AS3 tinted glass improves driving comfort, provides better protection against the sun, and increases privacy for rear-seat passengers.

Specifications and technical data

• SKU: 8W5845205A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W5845205A
• Substitutable numbers: 8W5845205A, 8W5 845 205 A
• Location on the vehicle: Rear, Left
• Category: Car Glass

Purpose and function of the rear left window

The presented window has been designed specifically for installation in the rear left door, which guarantees a proper fit to the body structure and door guides. The AS3 tinted glass reduces interior heating, minimizes glare, and improves visual comfort for passengers during sunny days.

As an original Audi component, the glass maintains factory geometry, which facilitates proper seating in the door frame, cooperation with the lifting mechanism, and sealing against the weatherstrips.

Advantages of AS3 tinted glass

• Reduction of sunlight penetration into the vehicle interior.
• Improvement of thermal comfort for rear-seat passengers.
• Increased privacy thanks to the darker glass surface.
• Better protection of upholstery and interior elements against fading.

AS3 tinted glass is a particularly beneficial solution in cars used intensively in urban conditions and on longer routes, where exposure to solar radiation is high. Thanks to this element, you can practically improve the ergonomics of using the vehicle without interfering with the body structure.

Condition of the element and assembly aspects

The glass comes from the secondary market, which allows for an economical replacement of damaged glass while maintaining the manufacturer's original specifications. The used component is a good choice when you want to maintain the factory character of the vehicle at reasonable repair costs.

Installing the glass in the rear left door requires standard service procedures: removing the door upholstery, detaching the glass from the regulator, and correctly positioning it in the guides. It is recommended to entrust the work to a workshop experienced in handling Audi bodies, which will ensure tightness and proper operation of the lifting mechanism.

Safety and body compatibility

The glass from the Car windows category plays an important role in the side structure of the vehicle – it forms a protective barrier, affects door rigidity, and passenger safety. Using original glass with the appropriate AS3 tint level allows for maintaining the parameters provided by the vehicle manufacturer, including proper visibility and compliance with homologation regulations.

Thanks to maintaining the factory shape and thickness of the glass, the element works correctly with seals, trim strips, and the window lifting mechanism, minimizing the risk of rattles, leaks, or excessive stress in the doors.

Expanding the glazing zone in Audi

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

Technical knowledge and vehicle operation

While working on the body and driving comfort, it is also worth taking care of the engine cooling system, which is particularly burdened during the summer. How high temperatures affect the operation of the radiator and fans and when it is worth considering used components is described in the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. Thanks to this, you will gain a broader perspective on the operation of your car and better plan subsequent service work.