BMW X1 E84 Rear Glass Left N/S Fixed Triangle Window AS3 2991377

BMW X1 E84 Rear Glass Left N/S Fixed Triangle Window is an original body component from the Car Windows category, designed for installation on the rear left side of the vehicle. The fixed, non-opening design ensures a stable body seal, and the precise fit for the specific BMW X1 E84 model facilitates a hassle-free replacement of a damaged window. It is a practical solution for users seeking a factory fit and a consistent look for the side of the vehicle body.

Specifications and technical data

• SKU: 2991377
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2991377
• Substitutable numbers: 2991377, 51372991377
• Location on the vehicle: Rear, Left
• Category: Car Glass

Purpose and fitment for BMW X1 E84

The presented glass is a fixed, side triangle window mounted in the rear part of the body on the left side of the BMW X1 E84 model. The component has been designed specifically for the body geometry of this model, which translates into:

• proper adhesion to the body frame,
• preservation of factory gaps and styling lines,
• consistent appearance with the vehicle's other windows.

Thanks to this, replacing a damaged window with an original BMW side window allows you to maintain the aesthetics and functionality of the factory build without the need for modifications.

Technical and functional characteristics

The fixed triangle window in the rear part of the body performs several important utility functions. It is responsible for illuminating the interior in the rear passenger zone, improving visibility and travel comfort, while also contributing to the rigidity of the side bodywork. The fixed (non-opening) design means:

• stable seating in the body frame,
• no moving mechanisms requiring adjustment,
• easier installation compared to opening windows.

A properly selected rear left window also helps reduce air turbulence in the cabin and noise, which translates into more comfortable vehicle operation.

Benefits of using an original BMW window

Using a factory side window in the BMW X1 E84 primarily ensures reliable body fitment and predictable component behavior in daily use. Compared to aftermarket replacements, the original component provides:

• compliance with factory installation standards,
• the correct edge profile for seals and trims,
• optical consistency with the vehicle's other windows.

The used nature of the part allows for economical repair while maintaining the manufacturer's original specifications, which is particularly important for post-accident repairs or window replacement after mechanical damage.

Vehicle placement and installation aspects

The element is intended for installation in the rear part of the body on the left side. Such placement requires precise fitting to the window frame and cooperation with factory seals and trim strips. In practice, this means that:

• the window should be installed in accordance with the body assembly direction,
• it is important to maintain the correct sequence of disassembly and assembly work,
• it is worth paying attention to the condition of adjacent seals and mounting elements.

Replacing a window in this area of the body is a typical stage of body and paint repairs after side damage, which is why a well-selected element significantly facilitates restoring the vehicle to full operational efficiency.

Used window – a practical service solution

Choosing a used BMW side window is a reasonable compromise between repair costs and maintaining original quality. This type of element allows you to:

• reduce expenses compared to a new part,
• maintain factory fitment parameters,
• speed up the repair process thanks to a ready-to-install component.

This solution is particularly beneficial for repairing vehicles used on a daily basis, where both functionality and a rational approach to the service budget are important.

If you are planning a comprehensive repair or upgrade of the side glazing zone in your BMW and need other elements from the same group, such as door windows, additional side windows, or other fixed glazing, check the available parts in the BMW Car Windows category.

To better plan service work on your car and optimize operating costs, it is worth reading the guide on the impact of temperatures on vehicle components – detailed tips can be found in the article Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.