Mitsubishi Fuso FE-HD Back Up Light Bulb Size

The Mitsubishi Fuso FE-HD back up light utilizes bulb sizes 1156 and P21W for the rear illumination system. Data for the specified lighting 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 back up light bulb size listed for the Mitsubishi Fuso FE-HD across the 1996-1998 model years.
The 1156 is an ANSI-standardized bulb type, meaning it conforms to a defined set of electrical and physical specifications recognized across the United States and Canada.
This bulb operates on a 12-volt electrical system and draws 21 watts, which is typical of incandescent reverse light applications in light-to-medium duty commercial vehicles of that era.
The 1156 uses a BA15s bayonet base, a single-contact mount where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d variant used in other applications.
Because the 1156 is a single-filament bulb, it serves one dedicated function per socket, unlike dual-filament types that handle two lighting functions such as stop and tail simultaneously.
The BA15s bayonet base requires a push-and-twist installation motion rather than a screw-in action, which is a fitment detail relevant when sourcing a replacement from a different product line or manufacturer.
Substituting a dual-contact bayonet bulb such as the 1157 in place of the 1156 is not compatible, as the base pin configuration differs and the socket is designed specifically for the single-contact BA15s mount.