Mitsubishi Lancer Back Up Light Bulb Size

The Mitsubishi Lancer back up light utilizes 7440 and 921 bulb sizes for the specific lighting components located at the rear of the vehicle. Data for the specified bulb sizes covers the range from 2002 through 2017.

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
2015-2017	7440
2008-2009	7440
2007	921
2002-2003	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.	7440
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

Other Locations

Additional Notes

The Mitsubishi Lancer back up light specifications cover model years 2002-2003, 2007-2009, and 2015-2017, with two distinct bulb sizes appearing across those years.
The 7440 is the bulb size specified for the 2015-2017 and 2008-2009 Mitsubishi Lancer back up lights.
The 7440 is a single-filament wedge bulb following the T20 form factor, rated at 12V and 21W, and conforms to ANSI standards for the US and Canadian markets.
The 921 is the bulb size specified for the 2002-2003 and 2007 Lancer back up lights.
The 921 is a wedge bulb following the T15 form factor, rated at 12V and 16W, and also conforms to ANSI standards for the US and Canadian markets.
The T20 (7440) and T15 (921) form factors are physically distinct wedge sizes, meaning the two bulb types are not interchangeable despite both using a wedge base design.
The 7440 operates at 21W while the 921 operates at 16W, reflecting a difference in power draw that corresponds to their respective socket and housing specifications.
The 2007 Lancer uses the 921 bulb, while the 2008 and 2009 models use the 7440, indicating a change in back up light bulb specification between those model years.