For the 2012 Toyota Tundra, the low-beam headlight uses an H11 bulb, while the high beam uses a 9005. Replace each bulb with the correct application for its position, and compare the original bulb before servicing interior locations with listed alternatives.
The front turn signals, daytime running lights, and parking lights use 4157NA bulbs. Rear lighting is split between 3157R bulbs for the brake and tail lights and 3157A bulbs for the rear turn signals and rear side markers. The front side markers use 168NA.
For visibility and utility lighting, the reverse lights and center stop light use 921 bulbs. License plate lighting is listed with either 168 or 917, and the same two options are listed for the dome, door-mirror, and map lights. The step light and glove-box light use 2721, while the vanity light uses 7065. The ash light may use 2721 or 74; compare it with the original bulb before ordering. No fog-light fitment is provided.