For the 2018 Ford Expedition, headlight bulb fitment varies by configuration. The low beam uses either an LED setup or an H11 bulb, while the high beam uses either LED or 9005. Confirm the headlight type before ordering, since LED and replaceable-bulb applications require different parts.
The fog lights, daytime running lights, front side markers, and center stop light use LED fitment. The front turn signal and parking light use 7444NA bulbs. Reverse lights use 3057 bulbs.
Rear lighting depends on the headlight configuration: models with halogen headlights use 3057R for the brake and tail lights and 3057 for the rear turn signal. Models with LED headlights use LED fitment for all three of those functions. Interior applications—including the dome, glove box, map, trunk, and vanity lights—use LED fitment. License plate lighting is listed with either 168 or 917 bulbs, so verify the existing bulb or socket before purchasing.