Harley-Davidson XG750A Street Rod Headlight Bulb Size
The Harley-Davidson XG750A Street Rod headlight bulb uses a 9003 size for both high beam and low beam functions. The replacement chart covers 2017 to 2020 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 9003 bulb is the sole bulb type specified across all headlight positions for the Harley-Davidson XG750A Street Rod, covering both high beam and low beam functions for the 2017-2020 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments: one rated at 60W for high beam output and one rated at 55W for low beam output.
Because both the high beam and low beam positions share the same 9003 specification, a single bulb type serves both lighting functions in the XG750A Street Rod's headlight assembly.
The 9003 operates on a 12V electrical system, which is standard for motorcycle applications of this type.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm collar. This base type is specific to the 9003 and its international equivalent, the H4, and is not interchangeable with other common automotive base types.
The 9003 is defined under ANSI standards as used in the United States and Canada. Its international counterpart, the H4, shares the same physical and electrical characteristics but is governed by ECE regulations. The two are functionally interchangeable in most applications, though the designation differs by market.