The Moto Guzzi Stelvio 1200 uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2009 through 2018 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 is the sole bulb type specified across all headlight positions on the Moto Guzzi Stelvio 1200, covering model years 2009-2018 with the exception of 2012.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam output, which accounts for its use in both headlight positions on this motorcycle.
Operating on 12 volts, the 9003 draws 60 watts on the high beam filament and 55 watts on the low beam filament, reflecting the greater light output demanded of the high beam circuit.
The 9003 uses a P43t base, a standardized bayonet-style fitting that determines physical compatibility with the headlight housing socket.
The 9003 designation follows the ANSI standard used in the United States and Canada, and it is electrically and functionally equivalent to the H4 bulb used under European and international standards, though housing fitment may differ depending on the socket design.
Because the same bulb type serves both the high beam and low beam positions across all listed years, a single replacement unit is sufficient to address either function on the Stelvio 1200.