The Harley-Davidson XL1200CX Roadster uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2016 to 2020 vehicle 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 is the specified bulb type for both the high beam and low beam headlight positions on the Harley-Davidson XL1200CX Roadster across the 2016-2020 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both high and low beam functions within one housing.
The 9003 operates on a 12-volt electrical system and carries a wattage rating of 60W for the high beam filament and 55W for the low beam filament.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm collar, and this base type determines physical fitment into the headlight socket.
The 9003 is designated as an ANSI standard bulb applicable in the United States and Canada, distinguishing it from the H4 bulb, which is its functionally equivalent counterpart sold under ECE standards in other markets.
Because the 9003 and H4 share the same dual-filament design, wattage ratings, and P43t base, they are widely regarded as interchangeable in practice, though the 9003 designation reflects the specific regional standard referenced in these specifications.