Mitsubishi Fuso FM-MR Back Up Light Bulb Size

The Mitsubishi Fuso FM-MR back up light requires 1156 and P21W bulb sizes for the rear lighting system. Data for the specific components covers the range from 1996 to 1998.

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
1996-1998	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 1156 is the sole bulb type listed for the Mitsubishi Fuso FM-MR backup light across the 1996-1998 model years.
The 1156 is an ANSI-standardized bulb used in the United States and Canada, operating at 12 volts and 21 watts.
As a single-filament bulb, the 1156 is dedicated to one lighting function, which in this application is the backup light.
The 1156 uses a BA15s bayonet base, a single-contact mount where the bulb locks into the socket with a quarter-turn motion.
The BA15s base is not interchangeable with dual-contact bayonet bases such as the BA15d, so substitution with physically similar but electrically different bulbs would result in an incorrect fit.