Mitsubishi Lancer Map Light Bulb Size

The Mitsubishi Lancer map light utilizes DE3175 and 12961 bulb sizes for the interior lighting components. Available data for the specific bulb requirements covers the period 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	DE3175
2007-2009	DE3175
2002-2003	12961

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The Mitsubishi Lancer map light specifications cover model years 2002-2003 and 2007-2009, as well as 2015-2017.
Two distinct bulb types appear across these model years: the DE3175 festoon bulb and the 12961 miniature wedge bulb.
The DE3175 is the more widely specified of the two, covering the 2007-2009 and 2015-2017 model years.
The DE3175 follows the ANSI standard recognized in the United States and Canada, operating at 12 volts with a 31mm festoon length and end-cap contacts.
Festoon bulbs make electrical contact at both ends of the bulb body rather than through a base, which distinguishes them from wedge-type bulbs.
The 12961 is a Philips part number designation for a T10 miniature wedge bulb, specified for the 2002-2003 Mitsubishi Lancer.
The 12961 uses a W2.1x9.5d wedge base, operates at 12 volts, and is rated at 5 watts.
The W2.1x9.5d base is a standardized wedge base type in which the numerical values describe the contact width and pin spacing, ensuring a specific physical fit.
The DE3175 and 12961 are not interchangeable, as they differ in both physical form and base type, with one using end-cap contacts and the other a wedge base.
Selecting the correct bulb type requires matching the model year to its specified size, since the two bulb types serve different generations of the Lancer.