Harley-Davidson XL1200C Sportster 1200 Custom headlight bulbs utilize a 9003 size for both high and low beam functions. The replacement chart covers vehicle production spanning 1996 to 2019.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Harley-Davidson XL1200C Sportster 1200 Custom uses the 9003 bulb size for both the high beam and low beam headlight positions across the 1996-2019 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments, one rated at 60W for the high beam and one at 55W for the low beam.
Because both beam positions share the same 9003 bulb, a single bulb type serves the entire headlight assembly rather than requiring separate bulbs for each function.
The 9003 operates on a 12V electrical system, which is standard for motorcycle applications of this type.
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 designation follows the ANSI standard used in the United States and Canada. It is electrically and functionally equivalent to the European H4 bulb, though the two designations originate from different standardization bodies and packaging may differ.