Plymouth Valiant License Plate Bulb Size

The Plymouth Valiant license plate light uses 168 and 67 bulb sizes depending on the specific production period. Available information covers the span from 1960 through 1976.

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
1972-1976	168
1960-1971	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. Lower wattage variant of 1156. 12V, 8W.	67

Other Locations

Additional Notes

The Plymouth Valiant uses two distinct bulb types across its production run for the license plate position: the 168 and the 67.
The 168 bulb is the specified fitment for the Plymouth Valiant (1972-1976), covering the later five model years in the dataset.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, conforming to ANSI standards for the US and Canadian markets.
The T10 wedge base of the 168 requires no locking mechanism, as the wedge-shaped base of the glass envelope itself secures the bulb within the socket.
The 67 bulb is the specified fitment for the Plymouth Valiant (1960-1971), spanning the earlier twelve model years in the dataset.
The 67 uses a BA15s bayonet base, a single-contact design where two offset pins on the base lock into corresponding slots in the socket with a push-and-twist motion.
The 67 is rated at 12V and 8W, making it a higher-wattage bulb than the 168, and it is described as a lower-wattage variant of the 1156 bulb within the same bayonet base family.
Because the 168 uses a wedge base and the 67 uses a BA15s bayonet base, the two bulb types are physically incompatible and not interchangeable with each other.
Both the 168 and the 67 are single-filament bulbs, which is standard for license plate lighting applications that require only a steady-on function.
Both bulb types carry ANSI standardization, meaning they conform to defined electrical and physical specifications recognized across the US and Canadian automotive markets.