For the 1999 Ford Taurus, both the low-beam and high-beam headlights use a 9007 bulb. The supplied fitment data does not list a headlight-type variation, so no projector or non-projector distinction is specified.
Front turn signals and parking lights use 3457A, while the front side markers use 194NA. At the rear, the brake and tail lights use 3157R, the rear turn signals use 3157, and the reverse lights use 3156. The center stop light uses 912. License-plate lighting may use either 168 or 917.
Interior and auxiliary fitments include 906 for the engine and trunk lights, 168NA for the rear side markers, and 194 or 7441 for the glove box and turn indicator applications. Several courtesy, dome, map, and instrument-panel locations have multiple options; compare the original bulb before ordering. Listed choices include 161, 194, 7441, 214-2, 579, 211-2, 578, and 37 depending on the location and option.