Suzuki Motorcycle GZ250 headlight bulbs utilize a 9003 size for both high beam and low beam functions. The replacement chart covers vehicle production spanning 1999 to 2010.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Suzuki Motorcycle GZ250 uses the 9003 bulb for both high beam and low beam headlight functions across all model years from 1999-2010.
The 9003 is an ANSI-standardized bulb type recognized in the United States and Canada, operating on a 12-volt electrical system with a dual-filament halogen design rated at 60 watts for high beam and 55 watts for low beam output.
The dual-filament construction of the 9003 allows a single bulb to serve both the high beam and low beam headlight positions, which is why the GZ250 shares the same bulb size across both functions.
The 9003 bulb uses a P43t base, a standardized bayonet-style fitting that determines physical socket compatibility and is not interchangeable with other base types such as P14.5s or PX26d.
The 9003 and H4 bulb types share the same P43t base and dual-filament halogen construction, though they originate from different regional standardization systems, with 9003 being the ANSI designation and H4 being the ECE designation used in Europe and other markets.
Because the same 9003 bulb specification applies to both beam positions across all 1999-2010 model years, only one bulb type is required for headlight replacement on the GZ250 regardless of which function has failed.