Number plate light gasket. Porsche 356B / 356C  ›  64463161405

The OE MATCH License / Number Plate Light Gasket is a replacement rubber sealing component designed for Porsche 356 B and 356 C models manufactured between 1959 and 1965.

Fits:

• Porsche 356 B/C 1.6L 01/59-12/65

Designed to provide OE-style fitment and reliable weather protection, this gasket fits between the number plate light glass and its surrounding lamp housing, helping create a secure seal against moisture, dust, dirt and road contaminants.

Also known as a number plate lamp glass gasket or licence plate light lens seal, this component forms an essential part of the rear registration plate lighting assembly. It helps maintain correct glass positioning while protecting the internal bulb holder and electrical connections from environmental exposure.

Over time, original rubber gaskets can deteriorate due to ageing, temperature changes, moisture and prolonged compression. Worn or damaged seals may become cracked, hardened, flattened or deformed, reducing their ability to protect the lamp assembly.

The OE MATCH License / Number Plate Light Gasket provides a practical replacement solution for restoring the original sealing arrangement without requiring replacement of the complete number plate light assembly.

Ideal for routine lighting maintenance, rear bodywork refurbishment and classic Porsche restoration projects, this component helps preserve the functionality, weather resistance and authentic appearance of the Porsche 356 rear lighting system.

What This Product Does:
The number plate light gasket forms a protective seal between the lamp glass and its housing, helping prevent moisture and contaminants from entering the rear registration plate illumination assembly.

It also provides a cushioning interface that supports correct glass seating and helps protect the lens from excessive contact with the surrounding housing.

Its key functions include:

• Weather Protection: Helps prevent rainwater and road spray from entering the number plate lamp assembly.
• Moisture Sealing: Creates a protective barrier between the lamp glass and surrounding housing.
• Electrical Component Protection: Helps shield the bulb holder and electrical connections from moisture and contamination.
• Corrosion Prevention: Reduces exposure to conditions that can cause oxidation and corrosion around internal electrical contacts.
• Dust and Dirt Protection: Helps prevent the accumulation of road dust, dirt and debris inside the lamp assembly.
• Correct Glass Seating: Provides a suitable sealing interface that helps the lamp glass sit correctly within its housing.
• Glass Protection: Cushions the lens against the surrounding lamp housing, reducing direct contact between components.
• Vibration Reduction: Helps minimise unwanted movement and rattling of the lamp glass.
• Reliable Number Plate Illumination: Supports consistent lamp operation by maintaining protection around the internal components.
• Original Appearance: Maintains the factory-style sealing arrangement of the Porsche 356 rear number plate light.
• OE-Style Replacement: Restores the original lamp gasket configuration without requiring unnecessary modifications.

Common signs include:

• Cracked or Split Rubber: Visible cracks or splits indicate that the gasket may no longer provide an effective weather seal.
• Hardened or Brittle Material: Ageing rubber can lose flexibility, preventing it from conforming correctly to the lamp glass and housing.
• Flattened or Compressed Gasket: Prolonged compression may cause the seal to lose its original shape and sealing effectiveness.
• Shrinking or Deformation: An aged gasket may become distorted or shrink, leaving gaps around the lamp glass.
• Water Ingress into the Lamp: Moisture entering the number plate light assembly may indicate a damaged or incorrectly seated gasket.
• Condensation Behind the Glass: Water droplets or misting inside the lamp can indicate ineffective sealing.
• Corroded Bulb Holder: Moisture entering the assembly may cause oxidation or corrosion around the bulb holder and electrical contacts.
• Intermittent Number Plate Lighting: Moisture-related corrosion can contribute to unreliable electrical connections.
• Loose or Rattling Lamp Glass: A deteriorated or missing gasket may allow unwanted movement within the lamp assembly.
• Visible Gaps Around the Lens: Poor gasket contact may leave openings between the glass and surrounding housing.
• Dirt Accumulation Inside the Lamp: Dust or road contaminants collecting behind the glass may indicate a compromised seal.
• Perished or Crumbling Rubber: Surface deterioration or material breakdown indicates that replacement is required.
• Damaged Lamp Glass: A missing or severely deteriorated gasket may allow excessive contact between the glass and housing.
• Missing Gasket: An absent seal leaves the lamp assembly vulnerable to moisture, dust and vibration.

• Replacing a worn or damaged number plate light gasket is an important part of maintaining the weather protection, reliability and original condition of your classic Porsche 356.
• The rear number plate light assembly is exposed to rainwater, road spray, dust and changing temperatures during normal driving. The gasket provides an essential sealing barrier between the lamp glass and its surrounding housing, helping prevent moisture and contaminants from reaching internal electrical components.
• As the original rubber ages, it can become hard, brittle, compressed or cracked. Once the gasket loses its ability to form an effective seal, water may enter the lamp assembly, potentially causing corrosion around the bulb holder and electrical terminals.
• Moisture-related corrosion can lead to poor electrical contact, intermittent illumination or complete number plate light failure.
• A correctly fitted replacement gasket helps restore the protective seal around the lamp glass, reducing the likelihood of water ingress and helping maintain consistent lighting operation.
• The gasket also cushions the glass against the surrounding housing. This is particularly important on classic vehicles, where vibration and incorrectly seated components may contribute to unwanted rattling or damage to ageing lamp lenses.
• Maintaining effective registration plate illumination is important for night-time visibility and compliance with applicable roadworthiness requirements.
• Replacing deteriorated gaskets can help prevent further damage to the lamp assembly and reduce the need for more expensive repairs involving the housing, bulb holder or wiring.
• For Porsche 356 owners undertaking restoration projects, replacing aged rubber seals is an important part of preserving the original appearance and functionality of the vehicle.
• The gasket helps maintain the factory-style number plate light arrangement while allowing serviceable original components to be retained.
• During number plate lamp refurbishment, replacing the glass gasket alongside other deteriorated sealing components can help restore comprehensive weather protection.
• The OE MATCH License / Number Plate Light Gasket 64463161405/1 provides an OE-style replacement solution designed to protect the lighting assembly, reduce moisture-related deterioration and preserve the authentic appearance of the classic Porsche 356.