Honda Motorcycle VTX1800T uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2007 to 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 VTX1800T uses the 9003 bulb for both its high beam and low beam headlight positions across the 2007-2008 model years.
The 9003 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are defined by a recognized North American standards body, ensuring consistency across manufacturers in the US and Canada.
The 9003 is a dual-filament halogen bulb, which allows a single bulb unit to serve both high and low beam functions within one housing, rather than requiring separate bulbs for each beam mode.
The bulb operates on a 12-volt electrical system and draws 60 watts on the high beam filament and 55 watts on the low beam filament.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm flange. This base type determines physical fitment into the headlight housing and is not interchangeable with other base configurations.
The 9003 is functionally equivalent to the H4 bulb used in international markets, sharing the same dual-filament design and P43t base, though the 9003 designation reflects the ANSI classification system rather than the ECE system used elsewhere.