Harley-Davidson XL1200R Sportster 1200 Roadster headlight bulbs utilize a 9003 size for both high and low beam functions. The replacement chart covers 2004 through 2008 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 Harley-Davidson XL1200R Sportster 1200 Roadster uses the 9003 bulb size for both high beam and low beam headlight positions across the 2004-2008 model years.
The 9003 is an ANSI-standardized bulb designation used in the United States and Canada, operating at 12 volts with a dual-filament halogen construction rated at 60 watts for high beam and 55 watts for low beam.
Because a single 9003 bulb serves both the high beam and low beam functions, each headlight position draws from the same physical unit rather than requiring separate bulbs for each function.
The 9003 bulb uses a P43t base, which is a bayonet-style mount with a 43mm collar. This base type determines physical fitment and is not interchangeable with bulbs carrying different base designations, even when voltage and wattage ratings may otherwise align.
The 9003 designation is the ANSI equivalent of the international H4 bulb. While these two types share the same dual-filament halogen design and electrical ratings, their bases differ slightly, and substitution between the two requires confirmation of physical compatibility before installation.