The Aprilia SXV 450 headlight bulb size specifications indicate a 9003 bulb for both high beam and low beam applications. The replacement chart covers vehicle production years from 2006 to 2012 with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Aprilia SXV 450 uses the 9003 bulb for both high beam and low beam headlight positions across the 2006-2009 and 2012 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments, one rated at 60W for high beam output and one rated at 55W for low beam output.
The 9003 bulb operates on a 12V electrical system and uses a P43t base, which is a bayonet-style fitting with a 43mm collar width.
The 9003 designation follows the ANSI standard, which is the classification system used in the United States and Canada, making it the North American equivalent of what is internationally designated as the H4 bulb type.
Because the same 9003 bulb specification applies to both the high beam and low beam positions, the Aprilia SXV 450 uses a single dual-filament unit per headlight assembly rather than separate bulbs for each function.
The H4/9003 P43t base is a widely produced fitting, and bulbs carrying this specification from different manufacturers are generally interchangeable as long as the voltage and wattage ratings match the 12V, 60/55W requirement.