Original Porsche Part Genuine Porsche part 64474190100

The OE MATCH Instrument Bulb Holder With Single Screw Connection, Non-Insulated 64474190100/1 is a replacement dashboard lighting component designed for classic Porsche 356, 356A, 356B and 356C models manufactured between 1950 and 1965.

• Porsche 356, 356A, 356B and 356C models.

Designed to provide OE-style fitment and functionality, this instrument bulb holder secures the dashboard illumination bulb and provides an electrical connection within the vehicle's instrument lighting system.

The bulb holder features a single screw connection and non-insulated construction, matching the original-style arrangement used in applicable Porsche 356 instruments.

Also known as an instrument lamp holder, dashboard bulb socket or gauge illumination bulb holder, this component plays an important role in keeping the vehicle's instruments illuminated and readable during night-time driving.

Over time, original bulb holders can deteriorate due to corrosion, vibration, ageing, electrical resistance and repeated bulb replacement. Damaged or worn contacts may result in flickering instrument illumination, intermittent lighting or complete failure of an individual dashboard bulb.

The OE MATCH replacement provides a practical solution for restoring secure bulb retention and dependable electrical contact without replacing an otherwise serviceable instrument assembly.

Ideal for dashboard repairs, instrument refurbishment, electrical maintenance and classic Porsche restoration projects, this component helps preserve the original dashboard lighting arrangement and authentic appearance of the Porsche 356 interior.

What This Product Does:
The instrument bulb holder provides a secure mounting point and electrical connection for the bulb used in the vehicle's dashboard instrument lighting system.

When fitted to the appropriate instrument assembly, it holds the bulb in the correct position so that the instrument can be illuminated when the relevant lighting circuit is activated.

Its key functions include:

• Instrument Illumination: Supports lighting within the dashboard instruments, helping drivers read information in low-light conditions.
• Bulb Retention: Holds the instrument bulb securely in its designated position.
• Electrical Connection: Provides the connection required to deliver electrical power to the bulb.
• Single Screw Terminal: Allows the appropriate electrical wire connection to be secured through the original-style screw terminal.
• Non-Insulated Construction: Maintains the intended electrical arrangement of the applicable instrument assembly, where the holder's conductive body forms part of the designed circuit.
• Consistent Electrical Contact: Helps maintain reliable contact between the bulb and the vehicle's lighting circuit.
• Correct Bulb Positioning: Keeps the bulb correctly aligned within the instrument housing.
• Vibration Resistance: Helps prevent unwanted bulb movement during normal driving.
• Dashboard Visibility: Supports the driver's ability to read illuminated instruments after dark.
• Original Equipment Appearance: Helps preserve the factory-style dashboard lighting configuration.
• Restoration Compatibility: Provides an OE-style replacement for refurbishment of original Porsche 356 instruments.

Common symptoms include:

• Instrument Light Not Working: A failed electrical contact or damaged holder may prevent an otherwise functional bulb from illuminating.
• Intermittent Dashboard Illumination: The instrument light may work occasionally due to a loose or unreliable electrical connection.
• Flickering Instrument Light: Poor contact between the bulb and holder can result in flickering, particularly when driving over uneven surfaces.
• Corroded Electrical Contacts: Oxidation or corrosion around the holder or terminal can interfere with electrical conductivity.
• Loose Bulb Fitment: Worn retaining contacts may prevent the bulb from remaining securely seated.
• Damaged Screw Terminal: A stripped, corroded or damaged screw connection may prevent the supply wire from being secured properly.
• Broken or Bent Contacts: Physical deterioration may affect the holder's ability to retain the bulb or complete the electrical circuit.
• Burnt or Discoloured Contact Areas: Excessive resistance or poor electrical connections can sometimes cause localised overheating.
• Bulb Movement: A damaged holder may allow the bulb to shift position, resulting in unreliable illumination.
• Loose Electrical Wiring: A weakened terminal connection may allow the wire to become loose or disconnected.
• Visible Surface Corrosion: Rust or oxidation on metal surfaces may indicate long-term moisture exposure or poor storage conditions.
• Difficulty Installing the Bulb: A distorted or damaged holder may prevent the bulb from fitting correctly.
• Repeated Bulb Illumination Faults: Persistent problems after replacing the bulb may indicate a faulty holder or another circuit issue.
• Damaged Mounting Arrangement: An incorrectly seated or weakened holder may fail to make its intended connection with the instrument housing.

• Replacing a worn, corroded or damaged instrument bulb holder is an important part of maintaining the reliability and original functionality of your classic Porsche 356 dashboard lighting system.
• The instrument lighting system allows the driver to view important dashboard information during night-time and low-light driving.
• A functioning bulb holder ensures that the instrument bulb is correctly positioned and maintains the electrical contact necessary for dependable illumination.
• If the holder becomes corroded or its electrical contacts deteriorate, the bulb may receive an inconsistent electrical supply. This can result in flickering, intermittent lighting or complete loss of instrument illumination.
• Poor dashboard visibility can make it more difficult to monitor vehicle speed, engine operation, fuel level and other instrument readings after dark.
• The single screw connection is particularly important because it provides the means of securing the electrical wire to the bulb holder.
• If the screw terminal becomes damaged, corroded or loose, the resulting poor electrical connection may increase resistance, cause intermittent operation or contribute to localised heat build-up.
• Replacing the damaged holder helps restore secure wire attachment and reliable bulb contact.
• The holder's non-insulated construction is another important feature. It is intended for the corresponding original-style instrument arrangement and must be fitted correctly to ensure proper electrical operation.
• Installing an unsuitable or incorrectly positioned holder could cause electrical faults, including an unintended short circuit.
• For classic Porsche owners, preserving the original dashboard lighting configuration is particularly important during instrument refurbishment and interior restoration.
• Original components that have been in service for several decades may exhibit corrosion, metal fatigue or damage from previous repairs.
• The OE MATCH replacement allows an individual bulb holder to be renewed while retaining the original instrument assembly where it remains serviceable.
• This can provide a practical alternative to replacing or extensively rebuilding an otherwise functional dashboard gauge.
• Replacing deteriorated electrical components also provides an opportunity to inspect the associated wiring, terminals and instrument housing for further signs of ageing.
• The OE MATCH Instrument Bulb Holder 64474190100/1 provides an OE-style replacement solution designed to restore dependable instrument illumination, secure electrical connections and preserve the authentic functionality of the Porsche 356 dashboard.