Door window with window lifter rail, Clear. Porsche 911 68-79 Coupe  ›  90154201

Door Window With Window Lifter Rail, Clear, Without E-Mark.

The OE Match Door Window with Window Lifter Rail is a replacement clear side window glass assembly for classic Porsche 911 Coupe models. Supplied with the window lifter rail already associated with the glass, it provides an effective replacement for original door glass that has become scratched, damaged, broken or affected by problems around the window lifting mechanism.

Fits:

• Porsche 911 1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC

POSTING GLASS & WINDSCREENS
Although we take great care in packaging glass, we cannot offer insurance to cover breakage.
Therefore, we advise customers that they purchase glass by mail order at their own risk.

Diagram Ref No 7 And 9

The window forms an important part of the door assembly, providing visibility, weather protection and security while moving vertically within the door as the window regulator is operated. The attached lifter rail provides the connection and support required for the regulator mechanism to raise and lower the glass in a controlled and correctly aligned manner.

Designed as an OE-style replacement, this assembly is particularly suitable for restoration work, accident repair or refurbishment of ageing door and window mechanisms.

What This Product Does:

• Provides the main movable side window glass within the door.
• Maintains clear visibility through the side of the vehicle.
• Helps protect the cabin from wind, rain and road debris when closed.
• Works with the window regulator to raise and lower the glass.
• Uses the lifter rail to support and control the movement of the window.
• Helps keep the glass correctly positioned within the door frame and guides.
• Allows smooth and controlled window operation.
• Restores the appearance of damaged or heavily scratched original glass.
• Provides a replacement solution where the original glass or lifter rail is no longer serviceable.
• Helps maintain the original appearance of a classic Porsche during restoration.

Correct alignment between the glass, lifter rail, regulator and window guides is important for smooth operation. If any of these components become damaged or distorted, the window can tilt, bind or become difficult to operate.

Symptoms Of Wear Or Failure:
Door glass itself has few moving parts, but decades of use, contamination, incorrect adjustment and deterioration of the lifting mechanism can cause a range of problems.

Common signs that replacement may be required include:

• Cracked or broken window glass.
• Chips around the edges of the glass.
• Heavy scratches that affect appearance or visibility.
• Permanent marks or surface damage.
• Glass becoming loose within the lifter rail.
• Corrosion or deterioration of the window lifter rail.
• Window rattling inside the door.
• Glass tilting forwards or backwards while being raised.
• Window becoming difficult to raise or lower.
• Binding or sticking during operation.
• Window failing to close squarely against the seals.
• Excessive movement or play in the glass.
• Grinding, scraping or unusual noises when operating the window.
• Water or wind entering due to poor glass alignment.
• Window regulator struggling because the glass is no longer correctly supported.
• Previous accident damage to the glass or door mechanism.

A damaged or distorted lifter rail can prevent the regulator from supporting the glass evenly, causing the window to move at an angle rather than travelling smoothly through its guides.

Why Replacement Matters:
A correctly functioning door window is important for visibility, weather protection, vehicle security and everyday usability.

If the glass is badly scratched or damaged, visibility through the side window can be reduced. Cracked, chipped or weakened glass may also deteriorate further and eventually require urgent replacement.

Problems with the lifter rail can be equally important. The rail transfers movement from the window regulator to the glass. If it becomes loose, bent or corroded, the window may tilt or jam while being operated.

Continued operation with a damaged rail or misaligned glass can place additional strain on:

• The window regulator.
• Regulator arms and rollers.
• Window channels and guides.
• Door seals.
• Window winding mechanism or electric window motor, where fitted.
• The glass itself.

Replacing the complete glass and rail assembly restores a sound mounting point for the regulator and helps the window travel smoothly through its intended path.

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

90154201

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