For the 2012 Ford Taurus, headlight bulb fitment depends on the factory headlight system. Models with halogen headlights use a 9005 bulb for both the low beam and high beam. Models equipped with HID headlights use a D3S bulb for both functions. Verify the headlight type before ordering, since these applications are not interchangeable.
Other useful lighting details include a 3457A bulb for the front turn signal and parking light, while the rear turn signal uses a 7440A. The brake light is listed as 3157R, and the tail light may use either 3157R or 916 depending on the specific lamp configuration. The center stop light is LED. For routine exterior service, the reverse light uses 5008 and the license plate light uses 6418. Interior listings include 64111 for the dome light and either 2825 or 98 for the map light.