The Moto Guzzi Griso 1100 uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2005 through 2008 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 headlight bulb type listed across all model years of the Moto Guzzi Griso 1100, covering the 2005-2008 production span.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both high beam and low beam functions from one housing position.
Because the 9003 handles both beam functions, the high beam and low beam headlight positions on the Griso 1100 share the same bulb specification across all listed years.
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 bayonet-style mount with a 43mm collar, and this base type determines physical fitment into the headlight housing.
The 9003 is defined under the ANSI standard and is the designation used in the United States and Canada, making it regionally specific in its naming convention.
The 9003 is functionally equivalent to the H4 bulb used under international IEC standards, though the two designations originate from different standardization bodies and packaging differences may exist between them.