Plymouth Road Runner License Plate Bulb Size

The Plymouth Road Runner license plate light requires bulb sizes 168, 97, and 67 depending on the specific version of the vehicle. Data for the lighting components covers the range from 1968 to 1975.

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
1974-1975	168
1972-1973	97
1968-1971	67

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	97
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W.	67

Other Locations

Additional Notes

The Plymouth Road Runner uses three distinct bulb types across its 1968-1975 model years for the license plate position: the 67, 97, and 168.
The bulb 67 is the most widely specified type, covering the Plymouth Road Runner from 1968-1971 across four consecutive model years.
All three bulb types conform to ANSI standards recognized in both the United States and Canada.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, fitted to the 1974-1975 Road Runner. The wedge base design requires no locking mechanism, as the bulb is held in place by tension from the socket itself.
The 97 and 67 both use a BA15s bayonet base and are single-filament bulbs, making them structurally similar but electrically distinct. The BA15s base features a single locating pin, which orients the bulb in one fixed position within the socket.
The 97, fitted to the 1972-1973 Road Runner, draws 13W, while the 67 draws 8W. Despite sharing the same BA15s base type, these two bulbs are not interchangeable due to their differing wattage ratings.
Both the 97 and 67 are described as variants of the 1156 bulb family, which is a widely used automotive single-filament type. The 67 is the lower wattage variant of the two.
The transition from the 67 to the 97 between the 1971 and 1972 model years represents a shift to a higher wattage output for the license plate position, moving from 8W to 13W.
The transition from the 97 to the 168 between the 1973 and 1974 model years also involves a change in base type, from the BA15s bayonet to the T10 wedge format, meaning the socket design in the vehicle changed between those model years.