Mitsubishi Diamante Dome Light Bulb Size

The Mitsubishi Diamante dome light utilizes a DE3175 bulb size for illumination within the interior cabin area of the vehicle. Available data covers the specific range from 1992 through 2004 for the provided bulb specifications.

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
1992-2004	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 Diamante uses the DE3175 bulb for the dome light across all model years from 1992 to 2004.
The DE3175 is a festoon-type bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket.
The DE3175 operates at 12 volts, which is consistent with standard automotive electrical systems.
The 31mm length designation in the DE3175 specification refers to the physical span between the two end caps, which must match the mounting clips in the dome light housing for proper fitment.
The DE3175 conforms to ANSI standards as recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary one.
Because the DE3175 is an ANSI-standardized festoon bulb, other festoon bulbs of the same 31mm length and end-cap contact design are generally considered interchangeable, provided the voltage rating also matches.