Suzuki Motorcycle GSX-S1000 headlight bulbs utilize a 9003 size for both high and low beam functions. The replacement chart covers 2016 through 2019 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 specified across all headlight positions for the Suzuki Motorcycle GSX-S1000, covering the 2016-2019 model years.
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 is a dual-filament type, it serves both the high beam and low beam headlight positions simultaneously, which accounts for the identical bulb size listed under both sub-parts in the specifications.
The 9003 operates on a 12V electrical system and uses a P43t base, which is a bayonet-style fitting with a 43mm base width.
The 9003 designation follows the ANSI standard, which is the classification system used in the United States and Canada. This bulb is functionally equivalent to the H4 designation used under European ECE standards, though fitment compatibility between the two designations depends on the specific socket and retaining hardware of the vehicle.