Suzuki Motorcycle M109R Boulevard headlight bulbs use a 9003 bulb size for both high and low beam applications. The replacement chart covers 2006 through 2014 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 Suzuki Motorcycle M109R Boulevard uses the 9003 bulb size for both high beam and low beam headlight positions across all listed model years from 2006-2014.
The 9003 is an ANSI-standard halogen bulb recognized in the United States and Canada, operating on a 12-volt electrical system with a dual-filament design rated at 60 watts for high beam and 55 watts for low beam.
Because the 9003 contains both filaments within a single housing, one bulb serves both the high beam and low beam functions, which is reflected in the identical bulb size listed across both headlight positions in the specifications.
The 9003 uses a P43t base, a bayonet-style mount that physically determines fitment and is not interchangeable with bulbs carrying different base types, even when voltage and wattage ratings may otherwise align.
The 9003 is functionally equivalent to the H4 bulb used in international markets, sharing the same dual-filament halogen construction and P43t base, though the 9003 designation is specific to the ANSI classification system used in North America.
The consistent use of the 9003 across the 2006-2014 model range indicates a stable headlight housing design throughout those years, meaning a single bulb specification applies to the full span of listed production.