For the 2003 Ford Explorer, the supplied fitment data lists a 9005 bulb for the high-beam headlight. No low-beam bulb is provided in this data, so confirm the low-beam bulb from the existing lamp or vehicle documentation before ordering. No fog-light fitment is listed.
At the front, the turn signal, parking light, and front side marker use 3157A bulbs. Rear lighting uses different bulb types by function: the reverse light is 3156, the brake and tail lights use 3157R, and the rear turn signal uses 3157. The center stop light is listed with either 2825 or 98, while the license plate light may use 168 or 917.
Interior applications include a 578 bulb for the dome, map, and trunk lights; PC194 for instrument lighting; and 37 for the vanity light. Courtesy and general interior lighting are listed as 168 or 917, and the glove-box light may use 194 or 7441. Verify the original bulb where multiple options are shown.