Mitsubishi Outlander Dome Light Bulb Size

The Mitsubishi Outlander dome light utilizes a DE3175 bulb size for interior illumination within the cabin area. Provided data covers a continuous range from 2003 through 2020 for the specified vehicle.

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
2003-2020	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The Mitsubishi Outlander uses the DE3175 bulb size for the dome light across all listed model years from 2003-2020.
The DE3175 is a festoon-style bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket.
The "31mm" in the DE3175 designation refers to the length of the bulb, which is the critical fitment factor for festoon bulbs installed in fixed-length dome light housings.
The DE3175 operates at 12 volts, consistent with the standard electrical systems found in passenger vehicles.
The DE3175 designation follows ANSI standards applicable in the United States and Canada, meaning the specification reflects a standardized bulb classification rather than a proprietary one.
Because the DE3175 is an ANSI-standardized festoon bulb, replacement units from different manufacturers sharing that designation are generally interchangeable, provided the 31mm length and end-cap contact design are maintained.
Festoon bulbs of differing lengths, such as the 36mm or 42mm variants also common in automotive dome applications, are not interchangeable with the DE3175 despite sharing the same contact style.