Headlamp sidelight bulb. If your headlamps had the side light bulbs as part of the headlamp then this is the bulb. Quite often the sidelights were removed from the lower lamp and a hole was drilled into the headlamp in which case this 'might' be the bulb check. Mitsubishi no longer sell the MS820093 Bulb see HERE for location This an aftermarket LED Replacement Mitsubishi Part Number MS820093
