The Harley-Davidson FXSTS Springer Softail headlight bulb uses 9003 and H5006 sizes for both high and low beam functions. The replacement chart covers 1988 to 2006 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 unit contains both the high beam and low beam filaments. This is why the same bulb size is listed under both the High Beam Headlight and Low Beam Headlight positions for the Harley-Davidson FXSTS Springer Softail across the 1993-2006 model years.
The 9003 operates at 12 volts and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament. It uses a P43t base, which is a bayonet-style mount with a 43mm collar.
The 9003 conforms to an ANSI standard recognized in both the United States and Canada, placing it within a regulated specification for output and fitment rather than a proprietary manufacturer format.
The H5006 is a 5.75-inch round sealed beam unit used on the FXSTS Springer Softail for the 1988-1991 model years. Unlike the 9003, it is not a replaceable bulb housed within a separate housing; the entire sealed unit is replaced as one assembly.
The H5006 also operates at 12 volts and meets an ANSI standard applicable in the United States and Canada. Because it is a sealed beam, the reflector and lens are permanently integrated into the unit.
The transition from the H5006 sealed beam to the 9003 halogen bulb occurred between the 1991 and 1993 model years of the FXSTS Springer Softail. These two bulb types are not interchangeable, as they differ in construction, base type, and housing requirements.
A 9003 bulb is also cross-referenced as an HB2 or H4 in international markets, though the 9003 designation specifically reflects the ANSI standard used in North America. Substituting non-ANSI equivalents may affect compliance with regional regulations.