The Harley-Davidson FXS Blackline uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2011 to 2013 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 FXS Blackline, covering model years 2011-2013.
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 the 9003 serves both the high beam and low beam positions on the FXS Blackline, the same physical bulb handles both lighting functions rather than requiring separate bulbs for each.
The 9003 operates on a 12V electrical system, which is standard for automotive and powersports applications of this type.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm flange. This base type determines physical fitment into the headlight housing and is not interchangeable with other base configurations.
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 IEC standards, though the designations originate from different standardization bodies and packaging may differ.