The Kawasaki VN1600 Vulcan uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2003 to 2008 production 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 9003 bulb type is the sole bulb size specified for the Kawasaki VN1600 Vulcan across all listed model years, covering both high beam and low beam headlight positions from 2003-2008.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 60 watts for high beam output and one rated at 55 watts for low beam output.
This bulb operates on a 12-volt electrical system and uses a P43t base, which is a bayonet-style mount with a 43mm collar width.
The 9003 designation follows the ANSI standard used in the United States and Canada. It is electrically and physically equivalent to the European H4 bulb type, which means H4 bulbs are generally interchangeable with 9003 bulbs in terms of fitment and function.
Because the same 9003 bulb serves both the high beam and low beam positions on the VN1600 Vulcan, the headlight assembly uses a single bulb per housing rather than separate bulbs for each beam function.