Mitsubishi Mirage Back Up Light Bulb Size

The Mitsubishi Mirage back up light utilizes bulb sizes 921, P21W, and 1156 depending on the specific production version. Available technical data covers the time range from 1985 through 2024.

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
2023-2024	921
2017-2021	921
2014-2015	1156
1985-2002	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Mitsubishi Mirage back up light specifications reference two bulb types across the model's history: the 921 and the 1156.
The 921 is a T15 wedge-base bulb rated at 12V and 16W, standardized under ANSI specifications for the US and Canadian markets.
The 1156 is a single-filament bulb with a BA15s bayonet base, also ANSI standardized for the US and Canadian markets, rated at 12V and 21W.
The BA15s bayonet base on the 1156 uses a single contact point at the base, which is a defining fitment characteristic that distinguishes it from dual-contact bayonet variants.
The Mitsubishi Mirage (2017-2024) uses the 921 wedge bulb for the back up light position.
Model years 1985-2002 and 2014-2015 use the 1156 bulb in the back up light position.
The 921 and 1156 are not interchangeable, as they use fundamentally different base types: a wedge fitting versus a bayonet fitting.
The 1156 operates at 21W while the 921 operates at 16W, reflecting a difference in power draw between the two bulb types used across different Mirage generations.