Honda Motorcycle NX250 headlight bulbs utilize a 9003 size for both high beam and low beam functions. The replacement chart covers vehicle production spanning 1988 to 1990.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 bulb is the sole bulb type listed across all headlight positions for the Honda Motorcycle NX250, covering model years 1988-1990 for both high beam and low beam functions.
The 9003 is a dual-filament halogen bulb, meaning a single physical bulb contains two separate filaments, one rated at 60 watts for high beam output and one rated at 55 watts for low beam output.
Because the Honda Motorcycle NX250 uses the 9003 for both the high beam and low beam headlight positions, a single bulb type serves both lighting functions rather than requiring separate bulbs for each.
The 9003 operates on a 12-volt electrical system and uses a P43t base, which is a bayonet-style fitting with a 43mm collar width that physically determines socket compatibility.
The 9003 designation follows the ANSI standard applicable in the United States and Canada. This bulb is also commonly known by the international designation H4, and the two are generally considered interchangeable in fitment, though labeling may differ by market.
The P43t base is a keyed fitting, meaning the bulb can only be seated in one orientation. This prevents incorrect filament alignment, which would otherwise direct high and low beam output improperly.