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Rear side glass

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DISPLAYING 1 to 16 (of 29 products)
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90154304X21/1KIT
Product Information
Product Information
Rear 1/4 glass opening handle set.
Restore the function and finish of your classic Porsche’s pop-out quarter windows with this complete rear quarter window handle set, including left and right opening handles and the base gaskets for a perfect seal.
SET OF 2, left and right handles plus base gaskets.

Fits:
Porsche 911/912 1965 - 1977

Diagram ref no 14 and 18

Kit included: 
• 1x 90154304121 - left handle
1x 90154304221 - right handle
• 2x 90154349121 - plastic base gaskets

• Position: Rear quarter windows, left and right
 Type: Complete latch and seal set for pop-out (hinged) windows
 Function: The handles provide smooth, secure opening and closing of the rear quarter windows, while the base gaskets seal the hinge area against moisture and protect paintwork. Together, they restore correct alignment, sealing, and ease of operation for your vent windows.
  Benefits: Factory-correct appearance and motion, Leak-free sealing around base mounts, Restored smooth operation and proper window tension.

Over decades of use, the original handles can corrode or seize, and the gaskets flatten or crack, allowing water ingress and rattles.

Replace when:
Handles are pitted, stiff, or loose
 Windows won’t stay latched or aligned
 During bodywork, interior restoration, or seal replacement


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90154304X21
90154304121
90154304221

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Special Order item
90154301528
Product Information
Product Information
Right LEFT Quarter window black frame.

porsche

Fits:
Porsche 911 1974-77
Porsche 911 (930) Turbo 1975-77

Click 'Zoom in' for large parts diagram
Diagram Ref no 3

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90154301528
90154301628
90154301528

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Special Order item
90154301625
Product Information
Product Information
Right Quarter window chrome frame for 911 and 912 Coupe models with moveable window.

porsche

Fits:
Porsche 911/912 1968-77
Porsche 911 (930) Turbo 1975-77

Click 'Zoom in' for large parts diagram
Diagram Ref no 3

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90154301625
90154301625

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91154310
Product Information
Product Information
Lightweight rear 5mm Plexiglass 1/4 window, BLUE TINT
Fixed rear window

koblenz

Fits:
Porsche 911 - 1978 to 1989 Coupe
Porsche 911 (930) turbo 1978 to 1989
Porsche 964 - 1989 to 1994 Coupe
Porsche 993 - Coupe - 1994 to 1998

Lightweight rear quarter light window - made from Plexiglas.
Over 2 axes thermo formed and tempered for perfect shape. These come with polished edges, are scratch resistant and UV protected.
Available with 5 mm thickness in clear, green, grey and blue tinted.

Made in Germany.

Click 'Zoom in' for large parts diagram.
Diagram ref no 36

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91154310
91154310102
91154310202
96454310100
96454310200

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91154310
Product Information
Product Information
Lightweight rear 5mm Plexiglass 1/4 window, Clear.
Fixed rear window

koblenz

Fits:
Porsche 911 - 1978 to 1989 Coupe
Porsche 911 (930) turbo 1978 to 1989
Porsche 964 - 1989 to 1994 Coupe
Porsche 993 - Coupe - 1994 to 1998

Lightweight rear quarter light window - made from Plexiglas.
Over 2 axes thermo formed and tempered for perfect shape. These come with polished edges, are scratch resistant and UV protected.
Available with 5 mm thickness in clear, green, grey and blue tinted.

Made in Germany.

Click 'Zoom in' for large parts diagram.
Diagram ref no 36

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

91154310
91154310102
91154310202
96454310100
96454310200

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91154310
Product Information
Product Information
Lightweight rear 5mm Plexiglass 1/4 window, GREEN TINT
Fixed rear window

koblenz

Fits:
Porsche 911 - 1978 to 1989 Coupe
Porsche 911 (930) turbo 1978 to 1989
Porsche 964 - 1989 to 1994 Coupe
Porsche 993 - Coupe - 1994 to 1998

Lightweight rear quarter light window - made from Plexiglas.
Over 2 axes thermo formed and tempered for perfect shape. These come with polished edges, are scratch resistant and UV protected.
Available with 5 mm thickness in clear, green, grey and blue tinted.

Made in Germany.

Click 'Zoom in' for large parts diagram.
Diagram ref no 36

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

91154310
91154310102
91154310202
96454310100
96454310200

The product you are viewing cross references to these numbers
91154310
Product Information
Product Information
Lightweight rear 5mm Plexiglass 1/4 window, GREY TINT
Fixed rear window

koblenz

Fits:
Porsche 911 - 1978 to 1989 Coupe
Porsche 911 (930) turbo 1978 to 1989
Porsche 964 - 1989 to 1994 Coupe
Porsche 993 - Coupe - 1994 to 1998

Lightweight rear quarter light window - made from Plexiglas.
Over 2 axes thermo formed and tempered for perfect shape. These come with polished edges, are scratch resistant and UV protected.
Available with 5 mm thickness in clear, green, grey and blue tinted.

Made in Germany.

Click 'Zoom in' for large parts diagram.
Diagram ref no 36

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91154310
91154310102
91154310202
96454310100
96454310200

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Special Order item
90018614307
Product Information
Product Information
Pan-head screw M5x8 black for the glazing on the rear side window.

Fits:
Porsche 911 Coupé (1974 to 1977)

Diagram ref no 16

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90018614307
90018614307
90018603502

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90154349121/1
Product Information
Product Information
Plastic base gasket for quarter window assembly.
A precision-moulded plastic base gasket that sits between the quarter-window hinge/base and the body. It reproduces the OE profile to seal the mounting footprint, protect paint, and set the correct standoff so the glass and latch align properly.
Sold each, 2 required.

Fits:
Porsche 911/912 1965 - 1977

Diagram ref no 18

Application: Rear quarter window assembly (pop-out/hinged type) – Porsche 911
 Side-agnostic; sold each (order two if renewing both sides)

Function:
 Seals the hinge/base to the body to prevent water and dust ingress
 Protects paintwork from abrasion and crush marks
 Helps maintain correct window alignment, closing pressure, and reduced wind noise

Over time, the original quarter window base gaskets can harden, flatten, or shrink due to age, UV exposure, and temperature changes. This can cause water leaks, wind noise, or rattles, and may even lead to paint scuffing around the hinge area.

Replace the gasket when:
 • Performing glass or hinge installation, or during body/paint restoration
 The window shows misalignment, wind noise, or minor leakage
 • The existing seal appears cracked, brittle, or misshapen

 Replacing with a fresh gasket restores a tight seal, clean alignment, and factory-quality protection for your classic Porsche 911.

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90154349121
90154349121

The product you are viewing cross references to these numbers
Special Order item
90014800307
Product Information
Product Information
Raised countersunk head self-tapping screw, AM4x8, Black.

porsche

Fits:
Porsche 911 (1974 - 1977) *Only for Coupé vehicles
Porsche 911 Turbo (1975 - 1977)

Click 'Zoom in' for large parts diagram.
Diagram ref no 8

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90014800307
90014800307

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90154304
Product Information
Product Information
Rear 1/4 glass opening handle. 
Provides the lever action to latch, unlatch, and hold the rear quarter glass in the open or closed position, maintaining correct sealing pressure when shut and controlled ventilation when open.

Fits:
Porsche 911/912 1965 - 1977

Diagram ref no 14

Position: Rear quarter window, left or right (handle is typically side-agnostic)
 Sold each (order two to renew both sides)

Over time, the quarter window handle can become pitted, loose, or seize due to wear, corrosion, or age. A worn handle not only detracts from appearance but can also fail to latch the glass securely, leading to rattles or water ingress.

Replace the handle when:
The handle feels sloppy, stiff, or seized in operation.
The window won’t stay latched or won’t hold its open position.
Performing interior restoration, glass replacement, or seal service.

Installing a fresh handle restores proper latch function, smooth operation, and a clean, factory-correct look to your Porsche’s quarter windows.

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

90154304
90154304121
90154304221

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Special Order item
91154319
Product Information
Product Information
Rear 1/4 window chrome trim.

Fits:
Porsche 911 1974-79 Coupe

Diagram ref no 29

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91154319
91154319500
91154319600

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Special Order item
90154342300
Product Information
Product Information
Rear 1/4 window edge protection.

porsche

Fits:
Porsche 911 1965-77 COUPE
Porsche 911 (930) Turbo 1975-77

Click 'Zoom in' for large parts diagram
Diagram ref no 7

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90154342300
90154342300

The product you are viewing cross references to these numbers
Special Order item
99991104100
Product Information
Product Information
Rear 1/4 window edge protection.

porsche

Fits:
Porsche 911/912 1965-77 COUPE
Porsche 911 (930) Turbo 1975-77 COUPE

Sold per metre

Click 'Zoom in' for large parts diagram.
Diagram ref no 24

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99991104100
99991104100

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90154310
Product Information
Product Information
Rear 1/4 window glass, Clear

Fits:
Porsche 911 - 1965 to 1977 (coupe)

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 11

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90154310
90154310220
90154310120

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90154310
Product Information
Product Information
Rear 1/4 window glass, Green Tint

Fits:
Porsche 911 - 1965 to 1977 (coupe)

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 11

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90154310
90154310230
90154310130

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DISPLAYING 1 to 16 (of 29 products)
1 2
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About Rear side glass

Preserve your Porsche’s sleek profile and cabin clarity with genuine Porsche and aftermarket rear side glass from Design911. These glass panels - also known as quarter windows — are precisely shaped to match your vehicle’s body contours, ensuring perfect fitment, crystal-clear visibility, and factory-correct styling.

Manufactured to OEM standards, our rear side glass selection includes fixed and opening quarter windows for both classic and modern Porsche models. Each panel is crafted from tempered or laminated safety glass, offering superior impact resistance, UV protection, and long-lasting transparency.

Whether you’re restoring a classic 911 or 356, repairing damaged glazing on a Cayman or Taycan, or upgrading to tinted glass for added comfort, Design911 supplies both genuine Porsche glass and high-quality aftermarket replacements for a precise, reliable finish.

Genuine Porsche Rear Side Glass
Factory-original Porsche rear quarter windows designed for exact fitment, safety, and clarity - perfect for restorations and replacements.

Aftermarket Rear Quarter Glass Panels
Premium reproduction glass panels that replicate OEM standards for quality, durability, and optical precision.

Fixed & Opening Rear Side Windows
Options for both fixed and hinged rear quarter windows, maintaining factory specifications for various Porsche models.

Tinted & UV-Resistant Glass
Available in clear, green, and privacy tints, offering additional sun protection and a premium finish.

Classic Porsche Quarter Windows
Authentic reproduction side glass for vintage Porsche models such as the 356, 911 Classic, and 964 — ensuring original styling and accuracy.

Seals, Hinges & Mounting Hardware
OEM-grade rubber seals, trim pieces, and hinges for watertight installation and smooth operation of quarter windows.

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