Pontiac Streamliner License Plate Bulb Size

The Pontiac Streamliner license plate light requires a bulb size of 63 for proper illumination of the rear vehicle identification area. Data for the specified component covers the period from 1950 to 1952.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1950-1952	63

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W.	63

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Additional Notes

The 63 bulb is the license plate bulb size for the Pontiac Streamliner across the 1950-1952 model years.
The 63 bulb follows the ANSI standard, meaning it conforms to specifications recognized across the United States and Canada.
This bulb operates on a 12-volt electrical system, which was standard for automotive applications of that era.
At 0.63 watts, the 63 bulb draws very little power, reflecting its role as a low-intensity illumination source for license plate lighting.
The 63 bulb uses a BA9s base, a miniature bayonet-style fitting with a 9mm cap width, commonly found in small indicator and auxiliary lighting applications.
The single-filament design of the 63 bulb means it serves one fixed function with no secondary brightness mode, as would be present in a dual-filament bulb.
The BA9s base type is a specific fitment requirement, and substituting a bulb with a different base type would be incompatible with the Streamliner's license plate socket.