Honda Motorcycle VT1100C3 Shadow Aero headlight bulbs utilize 9003 size bulbs for both high beam and low beam functions. The replacement chart covers 1998 to 2002 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 VT1100C3 Shadow Aero uses the 9003 bulb for both the high beam and low beam headlight positions across the 1998-2002 model years.
The 9003 is an ANSI-standard bulb recognized in the United States and Canada, operating on a 12-volt system with a dual-filament halogen design rated at 60 watts for high beam and 55 watts for low beam.
The dual-filament construction of the 9003 allows a single bulb to serve both beam functions, which is reflected in the identical bulb size listed for both the high beam and low beam positions in these specifications.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm collar, which physically determines fitment compatibility and is not interchangeable with bulbs carrying a different base type regardless of voltage or wattage similarity.
The 9003 and H4 bulbs share the same P43t base and dual-filament halogen design, making them functionally equivalent in many applications, though the 9003 designation follows ANSI standards while H4 follows ECE standards used in other markets.