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Porsche > 356 (1950-1965) > 356B 1959-63 > Electrical & Relays >

Window Mechanism

Window Mechanism

DISPLAYING 1 to 2 (of 2 products)
Window lifting rail. Porsche 356A T2 356B 356C Cabriolet - 64454204521, 64454204621 - 644.542.045.21, 644.542.046.21, 1688100370, 1688100380
2
Window lifting rail. Porsche 356A T2 356B 356C Cabriolet
64454204
Product Information
Product Information
Window lifting rail. Porsche 356A T2 356B 356C Cabriolet

oematch

Fits:
Porsche 356A T2 356B 356C Cabriolet

Click 'Zoom in' for large parts diagram.
Diagram ref no 27

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Related, superseded, cross reference or alternative numbers for comparison.

64454204
64454204521
64454204621

The product you are viewing cross references to these numbers
Window lifting rail. Porsche 356B / 356C Coupe - 64454204502, 64454204602 - 644 542 045 02, 644 542 046 02, 1688100270, 1688100280
3
Window lifting rail. Porsche 356B / 356C Coupe
64454204
Product Information
Product Information
Window Lifting Rail. 
Restore smooth and reliable window operation with this OE Match Window Lifting Rail. Designed for compatible vehicle applications, the lifting rail forms part of the door window regulator mechanism and helps support, guide, and control the movement of the window glass as it is raised or lowered.

Fits:
  • Porsche 356B 1959-63 (COUPE)
  • Porsche 356C 1963-65 (COUPE)

Diagram Ref No 23

The window lifting mechanism relies on correctly aligned rails, guides, regulator components, and mounting points to move the glass smoothly through the door frame. A worn, bent, corroded, or damaged lifting rail can interfere with this movement, causing the window to become stiff, uneven, noisy, or difficult to operate.  

What This Product Does:
  • Forms part of the window lifting and regulator mechanism.
  • Helps support the window glass during operation.
  • Guides the glass as the window is raised and lowered.
  • Helps maintain correct window alignment within the door.
  • Supports smooth and controlled window movement.
  • Helps prevent excessive glass movement or tilting.
  • Works with the associated regulator, guides, and mounting components.
  • Helps the window close correctly against its seals.
  • Replaces a worn, bent, corroded, or damaged lifting rail.
  • Provides an OE-style replacement for compatible vehicle applications.

Symptoms Of Wear Or Failure:
  • Window glass tilting while being raised or lowered.
  • Uneven or jerky window movement.
  • Window becoming difficult to raise or lower.
  • Excessive resistance when operating the window.
  • Scraping, grinding, clicking, or rattling noises inside the door.
  • Window glass dropping or becoming loose within the mechanism.
  • Window failing to close fully.
  • Poor alignment between the glass and window seals.
  • Excessive movement of the glass when partially open.
  • Visible corrosion, bending, distortion, or damage to the lifting rail.
  • Damage discovered while repairing the window regulator mechanism.

Why Replacement Matters:

  • The lifting rail plays an important role in keeping the window glass correctly supported and aligned. If the rail becomes bent, worn, corroded, or damaged, the glass may no longer travel through the door smoothly.
  • Continued operation with a faulty rail can place additional strain on the window regulator and associated components. Increased resistance or misalignment may accelerate regulator wear and can potentially cause further damage to guides, rollers, cables, mounting points, or the glass itself.
  • Incorrect window alignment can also prevent the glass from sealing properly when closed. This may contribute to increased wind noise, water ingress, rattling, or difficulty securing the vehicle.
  • Replacing a worn or damaged component with the correct OE Match Window Lifting Rail helps restore smooth window movement, correct glass alignment, reliable closure, and dependable operation of the window lifting mechanism.



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

64454204
64454204502
64454204602

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
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About Window Mechanism

Window mechanisms are the core components that allow your Porsche’s windows to move smoothly up and down. Located inside the door panel, these assemblies typically consist of a regulator, cables, pulleys, and guides that work together to raise or lower the glass when activated by the electric window motor and switch.

At Design911, we supply high-quality window mechanism assemblies for all Porsche models - from classic air-cooled 911s to the latest Boxster, Cayman, Cayenne, Macan, and Panamera. Each part is designed to restore precise window movement and perfect alignment, ensuring your car retains its comfort, performance, and style.

What Do Window Mechanisms Do?
The window mechanism (or regulator) transfers motion from the electric window motor to the glass. It ensures smooth, consistent, and balanced movement of the window within the guide rails. Depending on your Porsche model, the system may use a cable-operated, scissor-type, or gear-driven design.

A correctly functioning window mechanism ensures:

  • Smooth and quiet window travel.
  • Secure sealing against wind and rain.
  • Reliable operation for ventilation and safety.

Why Do Window Mechanisms Fail?

Over time, window regulators can wear out due to repeated use, exposure to moisture, and mechanical stress. Common causes of failure include:

  • Broken cables or pulleys: Caused by corrosion or tension fatigue.
  • Worn plastic clips or guides: Often brittle with age or temperature changes.
  • Motor strain: Caused by a stiff or misaligned regulator.
  • Internal gear damage: Resulting in uneven or stuck window travel.

Signs of failure include grinding noises, slow window operation, or glass stuck halfway.

Why Replace Faulty Window Mechanisms?

A failing window mechanism compromises both comfort and safety. A window that won’t close properly can let in rain, reduce security, or fail an MOT test. Replacing a worn mechanism ensures:

  • Restored smooth window movement.
  • Improved cabin comfort and quietness.
  • Proper sealing and protection from elements.
  • Prevention of further motor or switch damage.

Design911 offers OEM-spec and genuine Porsche window mechanisms for an exact fit and long service life — the ideal solution to restore factory-quality operation and appearance.

 

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