For the 2004 Honda Element, the low-beam and high-beam headlights both use a 9003 bulb. The supplied fitment data does not identify a projector/non-projector distinction or any headlight-type variation, so 9003 is the listed fitment for both beam functions.
For exterior lighting, the front turn signals and parking lights use 7443 bulbs. The rear turn signal uses 7440A, while the tail light and brake light use 7443R. The center stop light is listed as 7440. Front and rear side markers differ: the front uses 168NA and the rear uses 7443A.
The reverse light takes a 921. License-plate lighting may use either 168 or 917, so check the bulb currently installed before ordering. Interior dome, map, and trunk lights all use DE3175. No fog-light bulb fitment is listed for this model year.