Porsche Cayman 987C Quarter Side Window Fixed Glass Rear Left N/S 98754311100

Porsche Cayman 987C Quarter Side Window Fixed Glass Rear Left N/S is a precisely profiled body component designed for the rear section on the driver's side. This used, original glass from this series ensures a proper fit to the body lines, stable seating in the frame, and the preservation of the factory body geometry. It is a solution for users who want to restore the full functionality and aesthetics of the side body area without compromising on compatibility.

Specifications and technical data

• SKU: 98754311100
• Mark: Porsche
• Condition: Used
• OEM Part Number: 98754311100
• Substitutable numbers: 98754311100, 987 543 111 00
• Location on the vehicle: Rear, Left
• Part type: Rear Quarter Window
• Category: Car Glass

Purpose and fitment

The described glass is a component from the Car windows group, designed specifically for the rear, left side of the Porsche Cayman 987C body. Its characteristic triangular shape allows for the correct filling of the space between the body pillars, which translates into tightness, stability, and proper alignment of the side body line.

Thanks to the factory profile, the glass works with original seals and mounts, which facilitates installation and reduces the risk of stress in the glass. This is particularly important in sports cars, where body rigidity and the precision of component fitment affect driving comfort and interior acoustics.

Technical characteristics of the component

The triangular rear left side window in the Porsche Cayman 987C serves both a structural and functional purpose. It reinforces the side of the body in the rear pillar area while providing additional visibility in the zone behind the driver. The appropriately selected thickness and structure of the glass help reduce wind noise and improve cabin acoustic comfort.

The component is prepared for installation in the rear – left position, which eliminates the need for any modifications or adjustments. In practice, this means that after proper seating in the body frame, the glass maintains factory gaps, and the body line remains consistent with the other glazing elements.

Benefits of using original used glass

Using an original, used side window in the Porsche Cayman 987C allows you to combine cost control with maintaining a high level of fitment. Compared to universal solutions or low-quality replacements, this component:

• maintains the factory geometry of the side body section,
• helps maintain tightness in the rear pillar area,
• reduces the risk of improper glass stress during installation,
• facilitates service work thanks to the predictable mounting method.

For users analyzing the cost-effectiveness of purchasing new, replacement, or used parts, the comparative article Original, replacement, or used – which car parts are the most cost-effective?, which discusses the differences in costs, quality, and component fitment, may be helpful.

Use in body repairs and restoration

The triangular rear left side window is often replaced after mechanical damage, side collisions, or during comprehensive body restoration. A properly selected component allows you to restore:

• the continuity of the side body line,
• proper seal adhesion,
• a consistent appearance of the glazing on both sides of the vehicle.

During installation, it is worth paying attention to the condition of the frame, mounting points, and seals to fully utilize the potential of this glass and avoid subsequent leaks or rattles resulting from improper seating.

Operation and maintenance of the component

Maintaining the side window in good condition requires the use of appropriate cleaning agents and avoiding aggressive preparations that could affect the seals and the glass coating. Regular inspection of the condition of the seals around the window helps limit the ingress of moisture and contaminants into the body interior.

In the case of used body components, it is worth familiarizing yourself with practical maintenance tips described in the guide How to extend the life of used car parts?, which discusses, among other things, ways to protect dismantled components from accelerated wear.

If you are planning a comprehensive repair or upgrade of the side glazing area in your Porsche and need other components from the same group, such as side door windows, additional quarter glass, or other glazing formats, check the available parts in the Porsche car windows category.