For the 2004 Dodge Durango, both the low-beam and high-beam headlights use an H13 bulb. The supplied fitment data does not list a fog-light bulb for this model year.
Other notable exterior bulb sizes include 3457A for the front turn signals and parking lights, 3057 for the rear turn signals and reverse lights, and 3057R for the brake and tail lights. The center stop light uses a 921 bulb.
For smaller exterior lighting, the front side markers use 194NA, while the rear side markers use 168NA. License plate lighting may use either 168 or 917, so compare the original bulb before ordering.
Interior fitment also includes 578 for the dome light, 37 for the courtesy light, and 567 for the trunk light. The map light may use 578 or 214-2; compare the original bulb. The glove-box light may use 194 or 7441.