Harley-Davidson XL1200NS Iron 1200 Headlight Bulb Size
The Harley-Davidson XL1200NS Iron 1200 headlight bulb uses a 9003 size for both high and low beam functions. The replacement chart covers 2018 to 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 bulb is the sole bulb type listed across all headlight positions for the Harley-Davidson XL1200NS Iron 1200, covering model years 2018-2020.
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.
Because both the high beam and low beam headlight positions share the 9003 specification across all listed years, a single bulb type serves both lighting functions in this application.
The 9003 bulb operates on a 12-volt electrical system and uses a P43t base, which is a bayonet-style cap with a 43mm collar.
The 9003 designation is an ANSI standard recognized in the United States and Canada. It is functionally equivalent to the H4 bulb used under international ECE standards, though the designations originate from different standardization bodies.
The H4/9003 equivalency is a known interchangeability consideration. While the bulbs share the same physical base and filament configuration, fitment should correspond to the ANSI 9003 designation as listed in the specifications for this vehicle.