The Toyota T100 high beam and low beam headlight bulbs both utilize a 9003 size. The replacement chart covers vehicle production spanning 1993 to 1998.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota T100 uses the 9003 bulb across all available model years (1993-1998) for both high beam and low beam headlight positions.
The 9003 is an ANSI-standard halogen bulb recognized in the United States and Canada, operating on a 12-volt electrical system with a dual-filament design rated at 60 watts for high beam and 55 watts for low beam.
Because both the high beam and low beam positions share the same 9003 specification, a single bulb type serves both functions within one housing unit, which is characteristic of composite headlight assemblies.
The 9003 bulb uses a P43t base, a bayonet-style mount with a 43mm collar, which physically determines fitment and is not interchangeable with single-filament bases such as the H1 or H7 without modification.
The 9003 and H4 designations refer to the same physical bulb under different naming conventions, with 9003 being the ANSI designation used in North America and H4 being the ECE designation used in international markets.