Window lifter rail rubber seal. Porsche 911 / 964 / 993

Window lifter rail rubber seal fits into the window lift rail.
The window lift rail seal is an rubber strip designed to fit into the lower window lift rail, providing proper cushioning and grip for the door glass on Porsche 911, 964, and 993 Coupe models. It matches the original seal profile, hardness, and length to ensure smooth window operation and secure glass seating inside the lift channel.

Fits:
Porsche 911 1969 - 1989 ALL
Porsche 964 1989 - 1994 ALL
Porsche 993 1994 - 1998 Coupe

Diagram ref no 15.

The rubber sealing strip that sits inside the window lift rail (glass carrier channel). It grips the bottom edge of the door glass, ensuring the pane is securely held in place as the window regulator raises or lowers it.

This seal:
• Ensures the door glass is firmly clamped within the lift rail.
• Prevents rattling, vibration, or movement of the window during driving.
• Provides a cushioned interface between the metal rail and glass to prevent scratching or stress cracks.
• Helps maintain smooth and reliable window movement throughout the regulator’s travel.

Over time, the original window lift rail seal can harden, flatten, or crumble, causing the door glass to loosen inside the rail. This leads to rattling, uneven window movement, and even scratching or damage to the lower edge of the glass. Replacing the seal ensures the window is held firmly and quietly, restoring smooth operation and protecting both the regulator and the glass from premature wear.

Replace this seal if:
• The window moves inconsistently or tilts during operation.
• You hear rattling or vibration inside the door.
• The seal is visibly cracked, hardened, or missing sections.
• Glass shows scratches near the lower edge.
• You are replacing the regulator or restoring door internals.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91154249140

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