Plymouth Plaza License Plate Bulb Size

The Plymouth Plaza license plate light requires bulb size 67 or 63 depending on the specific version of the vehicle. Data for the bulb sizes covers the range from 1954 to 1958.

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
1956-1958	67
1954-1955	63

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W.	67
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W.	63

Other Locations

Additional Notes

The Plymouth Plaza uses two bulb types across its model years for the license plate position: the 67 and the 63.
The 67 bulb follows the ANSI standard recognized in both the US and Canada, operates on a 12V circuit, and draws 8W through a single filament mounted in a BA15s bayonet base.
The 63 bulb also conforms to ANSI standards for the US and Canadian markets, operates on 12V, and draws only 0.63W through a single filament seated in a BA9s base.
The BA15s and BA9s bases are physically incompatible with each other, meaning the 67 and 63 are not interchangeable despite both being single-filament, 12V bulbs.
The 67 is a lower wattage variant of the 1156 bulb, sharing the same BA15s bayonet base but producing less output, so a 1156 is not a direct drop-in replacement for a 67 in this application.
The Plymouth Plaza (1956-1958) takes the 67 bulb for the license plate position across those three model years.
The 1954-1955 Plymouth Plaza uses the 63 bulb for the license plate position.