Harley-Davidson XG500 Street 500 Headlight Bulb Size
Harley-Davidson XG500 Street 500 uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2015 through 2020 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 a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 60W for high beam operation and one rated at 55W for low beam operation.
The 9003 uses a P43t base, which is a three-pronged bayonet-style mount that physically locks the bulb into the housing and maintains correct filament alignment relative to the reflector.
The 9003 designation is the ANSI standard used in the United States and Canada. It is electrically and physically equivalent to the H4 designation used in international markets, making cross-reference between these two part numbers applicable for the Harley-Davidson XG500 Street 500.
Because the 9003 serves both the high beam and low beam positions on the XG500 Street 500, both functions are housed within a single bulb. Replacing one beam position requires replacing the entire bulb unit.
The bulb operates on a 12V electrical system, which is standard for motorcycle applications of this type.
The 9003 specification applies uniformly across the 2015-2020 model years of the XG500 Street 500 for both the high beam and low beam headlight positions, indicating no bulb specification change occurred during that production period.