Pontiac Tempest License Plate Bulb Size

The Pontiac Tempest license plate light requires bulb sizes 67 and 1155 for proper illumination of the rear registration area. Data for the specific lighting components covers the period from 1961 through 1970.

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
1965-1970	67
1964	1155
1961-1963	67

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 BA15s bayonet base. Variant of 1156. 12V, 21W.	1155

Other Locations

Additional Notes

The Pontiac Tempest license plate bulb is specified as the type 67 for nine of the ten model years covered, spanning 1961-1963 and 1965-1970.
The type 67 is an ANSI-standardized single-filament bulb rated at 12 volts and 8 watts, fitted with a BA15s bayonet base.
The BA15s designation refers to a single-contact bayonet base with a 15mm collar, a common base type in automotive lighting applications of that era.
The type 67 is a lower-wattage variant of the 1156 bulb, sharing the same BA15s base while drawing significantly less power, which is typical for low-intensity applications such as license plate illumination.
The 1964 Pontiac Tempest departs from the otherwise consistent fitment, specifying the type 1155 for the license plate position.
The type 1155 is also an ANSI-standardized single-filament bulb with a BA15s bayonet base, rated at 12 volts and 21 watts.
Although the 1155 and 67 share the same BA15s base and are both variants of the 1156, their wattage ratings differ substantially, at 21W and 8W respectively, making them non-interchangeable without consideration of the socket and circuit design.