Mitsubishi Van Back Up Light Bulb Size

The Mitsubishi Van back up light utilizes 1156 and P21W bulb sizes for the lighting system. Data for the specific components covers the time range from 1987 to 1990.

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
1987-1990	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 Mitsubishi Van uses the 1156 bulb for the back up light across the 1987-1990 model years.
The 1156 is an ANSI-standardized bulb, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard automotive incandescent back up light applications.
The 1156 is a single-filament bulb, meaning it serves one lighting function only, as opposed to dual-filament bulbs that handle two functions such as braking and running lights simultaneously.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a bayonet mount with a 15mm base width and a single contact pin, which determines physical fitment into the socket.
The BA15s single-contact base of the 1156 is not interchangeable with the BA15d base found on dual-filament bulbs such as the 1157, despite the two sharing a similar physical appearance and base width.