Plymouth PB350 License Plate Bulb Size

The Plymouth PB350 license plate light requires 168 or 1155 bulb sizes depending on the specific version of the vehicle. Data for the lighting components 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 PB350 license plate bulb specifications cover model years 1981 through 1983, with two distinct bulb types appearing across that span.
The 168 bulb is the more frequently specified type, appearing in both the 1982 and 1983 Plymouth PB350.
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 PB350 uses the 1155 bulb, which operates at 12 volts and 21 watts, a substantially higher wattage than the 168.
The 1155 uses a BA15s single-contact bayonet base, a base type that locks into its socket with a twist, unlike the wedge-style 168.
The 1155 is described as a variant of the 1156, meaning the two share a similar form factor but differ in electrical output, making them non-interchangeable despite their physical resemblance.
The base type difference between the 168 and the 1155 means the two bulbs are not interchangeable with each other, as their respective sockets are mechanically incompatible.
Both the 168 and the 1155 conform to ANSI standards applicable in the US and Canada, indicating standardized electrical and physical tolerances for each type.