The 9003 is a dual-filament halogen bulb, meaning a single unit contains two separate filaments: one rated at 60W for high beam output and one at 55W for low beam output.
The Hino 308 uses the 9003 bulb for both the high beam and low beam headlight positions across the 2006-2007 model years, with a single bulb type serving both lighting functions simultaneously.
The 9003 operates on a 12V electrical system, which is standard for light-duty vehicle applications.
The 9003 bulb is built to the ANSI standard and is recognized for use in the United States and Canada, indicating a regionally standardized specification rather than a global one.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm collar. This base type determines physical fitment into the headlight housing and is not interchangeable with other base configurations.
Because the 9003 handles both beam functions within one housing, replacing it with a single-filament bulb of similar wattage would not replicate the dual-beam capability required by the Hino 308 headlight system.