Honda Motorcycle VTX1800R headlight bulbs use a 9003 size for both high beam and low beam applications. The replacement chart covers 2002 through 2008 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Motorcycle VTX1800R uses the 9003 bulb size across all listed model years, 2002-2008, for both the high beam and low beam headlight positions.
The 9003 is an ANSI-standard bulb recognized in the United States and Canada, operating on a 12-volt electrical system with a dual-filament halogen 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 on the VTX1800R, a single bulb type serves both lighting functions within one housing unit.
The 9003 bulb uses a P43t base, which is a bayonet-style mount with a 43mm collar. This base type determines physical fitment and is not interchangeable with bulbs carrying different base designations, regardless of voltage or wattage similarities.
The 9003 designation is the ANSI equivalent of the internationally designated H4 bulb. Products sold under either designation share the same physical and electrical characteristics, though labeling may vary by market.