For the 2015 Toyota Tundra, both the low-beam and high-beam headlights use a 9003 bulb. This fitment data does not identify a separate bulb for different headlight types, so confirm the existing bulb and housing before ordering.
Front turn signals use 4157NA bulbs. Daytime running lights and parking lights are listed as LED, with a 4157NA alternative specifically for Limited models. The front side markers use 168NA.
At the rear, the brake and tail lights use 3157R bulbs, while rear turn signals use 921 bulbs. Reverse lights also use 7440, and the center stop light uses 921. License plate, dome, door-mirror, and map lights may use either 168 or 917 bulbs. Other listed applications include 2721 for the step light, 3157A for the rear side marker, 921 for the trunk light, and 7065 for the vanity light.