Plymouth Laser Back Up Light Bulb Size

The Plymouth Laser back up light utilizes 1156 and P21W bulb sizes according to the provided technical data. Information for the specific lighting components covers the period from 1990 through 1994.

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
1990-1994	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Plymouth Laser uses the 1156 bulb for the back up light across all listed model years, spanning 1990-1994.
The 1156 is a single-filament bulb, meaning it serves one lighting function only, which in this application is the back up light.
It operates on a 12-volt electrical system and draws 21 watts, consistent with standard automotive incandescent bulb ratings.
The 1156 uses a BA15s bayonet base, a single-contact mount where the bulb is inserted and twisted to lock into the socket.
The BA15s base is not interchangeable with the BA15d base, which is a dual-contact variant used on double-filament bulbs such as the 1157.
The 1156 carries ANSI standardization, indicating the bulb conforms to established dimensional and electrical specifications recognized in both the United States and Canada.
Because the same bulb size is specified across the full 1990-1994 production run of the Plymouth Laser, socket compatibility remains consistent throughout those years.