Mitsubishi Outlander Back Up Light Bulb Size

The Mitsubishi Outlander back up light utilizes 921 and 7440 bulb sizes for various production versions. Available information covers a specific range from 2003 through 2024 for the specified vehicle components.

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	US Type	EU Type	Shop
2022-2024	921	W16W	Check Price
2016-2020	921	W16W	Check Price
2003-2015	7440	W21W	Check Price

Bulb Specifications

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

Other Locations

Additional Notes

The Mitsubishi Outlander backup light uses one of two bulb types across its model years: the 921 (T15 wedge) for 2016-2024 and the 7440 (T20 wedge) for 2003-2015.
The 921 is a T15 wedge bulb rated at 12V and 16W, standardized under the ANSI system used in the United States and Canada.
The 7440 is a T20 single-filament wedge bulb rated at 12V and 21W, also conforming to the ANSI standard for the US and Canadian markets.
Although both the 921 and 7440 are wedge-type bulbs operating at 12V, they are not interchangeable. The T15 and T20 designations indicate different physical sizes, and the wattage differs by 5W between the two types.
The single-filament designation of the 7440 means it serves only one lighting function, which is consistent with its application as a dedicated backup light rather than a dual-purpose stop or tail light bulb.
The higher wattage of the 7440 (21W) compared to the 921 (16W) means the older Outlander fitment produces a greater power draw per bulb in the backup light circuit.