Plymouth PB250 License Plate Bulb Size

The Plymouth PB250 license plate light requires bulb size 168 or 1155 depending on the specific configuration of the vehicle. Data for the bulb requirements covers the range from 1981 to 1983.

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
1982-1983	168
1981	1155

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, 21W.	1155

Other Locations

Additional Notes

The Plymouth PB250 license plate bulb specifications cover model years 1981 through 1983, with two distinct bulb types appearing across that range.
The 168 bulb is the more frequently specified type, fitting the 1982 and 1983 Plymouth PB250 license plate position.
The 168 is a T10 miniature wedge bulb rated at 12 volts and 4.9 watts, conforming to ANSI standards for the US and Canadian markets.
The T10 wedge base design means the 168 bulb is retained by friction rather than a locking mechanism, requiring no rotation during installation or removal.
The 1981 Plymouth PB250 uses the 1155 bulb, which operates on a BA15s single-contact bayonet base and is rated at 12 volts and 21 watts.
At 21 watts, the 1155 draws considerably more power than the 4.9-watt 168, reflecting a significant difference in electrical load between the 1981 and 1982-1983 model years.
The 1155 is described as a variant of the 1156, meaning the two share a similar form factor but are not confirmed as interchangeable; substituting one for the other without verifying wattage and base compatibility could affect socket fit or circuit performance.
The 168 and 1155 use entirely different base types, a wedge versus a bayonet, making them physically incompatible with each other's sockets regardless of voltage rating.
Both bulb types conform to ANSI standards applicable in the United States and Canada, indicating they meet a defined set of dimensional and electrical tolerances for those markets.
Because the 1981 model year uses a different bulb type than the 1982-1983 years, year-specific verification is necessary before sourcing a replacement for the Plymouth PB250 license plate position.