Mitsubishi Starion Back Up Light Bulb Size

The Mitsubishi Starion back up light requires 1156 and P21W bulb sizes according to the provided specifications for the lighting system. Data for the bulb sizes covers the range from 1983 to 1989.

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
1983-1989	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 an ANSI-standardized bulb used in the United States and Canada, operating at 12 volts with a power rating of 21 watts.
The 1156 uses a single-filament design, which is typical for functions requiring a constant-on light output rather than a dual-intensity signal, making it suited for reverse lighting.
The BA15s bayonet base on the 1156 features a single contact pin, distinguishing it from the BA15d base found on dual-filament variants. These two base types are not interchangeable.
The Mitsubishi Starion uses the 1156 bulb for the back up light across all model years from 1983-1989, with no variation in bulb size across that span.