The Suzuki Motorcycle S83 Boulevard uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production years spanning 2005 to 2008.
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 headlight bulb type listed across all model years covered in these specifications for the Suzuki Motorcycle S83 Boulevard, applying to both the high beam and low beam positions throughout the 2005-2008 range.
The 9003 is a dual-filament halogen bulb, meaning a single physical bulb contains two separate filaments, one rated at 60 watts for high beam output and one rated at 55 watts for low beam output.
Because both the high beam and low beam headlight positions share the same 9003 bulb type, a single replacement bulb serves both functions within the same housing.
The 9003 bulb operates on a 12-volt electrical system and uses a P43t base, which is a bayonet-style mount with a 43mm flange used to seat and lock the bulb into the headlight housing.
The 9003 designation follows the ANSI standard recognized in the United States and Canada, distinguishing it from the functionally similar H4 bulb used in international markets, which shares the same dual-filament halogen design but carries a different designation under ECE regulations.
The P43t base of the 9003 and the P43t base of the H4 are physically identical in flange width, though the two bulbs are governed by different standards bodies and are not always treated as interchangeable in all regulatory or fitment contexts.