For the 2003 Lincoln Navigator, the low-beam headlight uses a D1R bulb, while the high beam uses a 9005. The supplied fitment data does not list a fog-light bulb for this model year.
Other useful exterior bulb sizes include 3157A for the front turn signal and parking light, 3157 for the rear turn signal and reverse light, and 3157R for the brake and tail lights. The front side marker uses 194NA.
- Center stop light: 2825 or 98
- License plate light: 168 or 917
- Interior lights: 211-2 courtesy, 578 dome/map/trunk
- Engine compartment: 912
Because the center stop, license plate, and tail-light listings include alternate bulb numbers, verify the existing bulb and socket before ordering. No headlight-type variation is specified in the supplied data.