Suzuki Motorcycle C109R Boulevard high beam and low beam headlight bulbs both utilize a 9003 bulb size. The replacement chart covers 2008 to 2009 vehicle 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 C109R Boulevard, covering both the 2008-2009 model years.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam operation rather than requiring two distinct bulbs.
Because the 9003 serves both the high beam and low beam positions on this motorcycle, the same bulb part number applies to either replacement scenario.
The 9003 operates on a 12-volt electrical system and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament.
The 9003 uses a P43t base, which is a standardized bayonet-style fitting that determines physical socket compatibility during replacement.
The 9003 designation follows ANSI standards as applied in the United States and Canada, which governs its electrical and physical specifications.
The 9003 and H4 bulbs share the same physical form and are often cross-referenced, though fitment should be confirmed against the ANSI 9003 specification rather than assumed from the H4 designation alone.