The Suzuki Motorcycle GSF1200 Bandit uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1997 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 the sole bulb type specified across all headlight positions for the Suzuki Motorcycle GSF1200 Bandit, covering both high beam and low beam functions for the 1997-2006 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.
The 9003 operates on a 12V electrical system and uses a P43t base, which is a bayonet-style mount with a 43mm collar.
The 9003 designation follows ANSI standards as applied in the United States and Canada. It is functionally identical to the H4 bulb used under international IEC/ECE standards, and the two designations are widely regarded as interchangeable in fitment.
Because the 9003/H4 serves both beam functions within a single housing, the GSF1200 Bandit headlight assembly does not require separate bulbs for high and low beam operation.
The P43t base is a keyed fitting, meaning the bulb can only be seated in one orientation, which ensures correct filament alignment relative to the reflector housing.