Harley-Davidson FXDL Low Rider headlight bulbs use 9003 size for both high beam and low beam applications. The replacement chart covers 1993 through 2017 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 is the sole headlight bulb type specified for the Harley-Davidson FXDL Low Rider across all listed model years, covering both the high beam and low beam positions throughout the 1993-2017 range.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both the high beam and low beam functions within one housing.
The bulb operates on a 12-volt electrical system and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament, which are standard output levels for this bulb type.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm collar that physically locks the bulb into the headlight housing at a fixed rotational orientation.
The 9003 designation follows the ANSI standard used in the United States and Canada. This standard is distinct from the ECE-regulated H4 bulb used in many other markets, though the two share the same physical form and are often cross-referenced as interchangeable.
Because the same 9003 bulb serves both beam functions in a single unit, the high beam and low beam positions listed in the specifications do not represent two separate bulb sockets; they refer to the two filaments within the same installed bulb.