Below is a list of light bulb types used in 2004- TOYOTA HILUX lighting system, covering pickup vehicles.
Headlight bulb: low beam - H4 / high beam - H4
Parking light bulb: W5W
Fog light bulb: HB4 or H16
Front indicator/turn signal bulb: WY21W
Rear indicator/turn signal bulb: P21W
Tail light bulb: P21/5W
Brake light bulb: P21/5W
Back-up light bulb: P21W
Rear fog light bulb: P21W
License plate light bulb: W5W
Light bulb sizes for other TOYOTA HILUX generations: HILUX (AN120/AN130)