The Honda Motorcycle VT1100C Shadow uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production years spanning 1985 to 2007.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Motorcycle VT1100C Shadow uses the 9003 bulb size for both the high beam and low beam headlight positions across all listed model years from 1985-2007.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 60W for high beam output and one rated at 55W for low beam output.
Operating voltage for the 9003 bulb is 12V, which is standard for motorcycle electrical systems in this class.
The 9003 bulb uses a P43t base, a bayonet-style mount with a 43mm flange that physically locks the bulb into the headlight housing.
The 9003 designation follows the ANSI standard as used in the United States and Canada. It is electrically and functionally equivalent to the H4 bulb used under European and international standards, though the designations originate from different standardization bodies.
Because the same 9003 bulb serves both the high beam and low beam positions on the VT1100C Shadow, only one bulb type is required to service the entire headlight assembly.
Substituting a single-filament bulb in place of the dual-filament 9003 would result in the loss of one beam mode, as a single-filament alternative cannot replicate both functions within the same housing.
The P43t base is a keyed fitting, meaning the bulb can only be seated in one orientation, which aligns each filament with the correct focal point inside the reflector housing.