Honda Motorcycle CB500X uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2013 to 2015 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 an ANSI-standard dual-filament halogen bulb rated at 12 volts, with a high beam filament drawing 60 watts and a low beam filament drawing 55 watts, mounted on a P43t base.
Because the 9003 carries two filaments within a single bulb, it serves both the high beam and low beam functions from one unit rather than requiring separate bulbs for each function.
The Honda Motorcycle CB500X uses the 9003 bulb across both the high beam and low beam headlight positions for the 2013-2015 model years.
The P43t base is a bayonet-style fitting with a 43mm collar, and correct base alignment is a factor in proper fitment, as bulbs with differing base types are not interchangeable even when their electrical ratings are similar.
The 9003 designation is specific to the ANSI standard used in the United States and Canada. Its international equivalent, the H4, shares the same dual-filament halogen construction and electrical ratings but carries a different designation under ECE regulations.
Although the 9003 and H4 are functionally equivalent, substitution between the two should account for whether the base and housing tolerances of the CB500X accommodate the specific variant being installed.