The Hyosung GT650 headlight bulb uses a 9003 size for both high beam and low beam functions. The replacement chart covers vehicle production spanning 2010 to 2017 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 in the Hyosung GT650 data, covering both high beam and low beam functions for the 2010-2017 model years.
The 9003 is a dual-filament halogen bulb, meaning a single physical bulb contains two separate filaments: one rated at 60W for high beam output and one rated at 55W for low beam output.
The Hyosung GT650 uses the 9003 for both its dedicated high beam and low beam headlight positions, which is consistent with the dual-filament nature of the bulb type itself.
The 9003 operates on a 12V electrical system and uses a P43t base, which is a bayonet-style fitting with a 43mm collar width that physically determines socket compatibility.
The 9003 is defined under ANSI standards applicable in the United States and Canada, classifying it as a regulated specification rather than a proprietary or manufacturer-specific bulb designation.
The 9003 bulb type is functionally equivalent to the H4 designation used under ECE regulations in other markets; however, physical interchangeability between 9003 and H4 units is not confirmed by the provided specifications and should not be assumed without verification.