The Ski-Doo Summit 550 Fan uses 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2003 through 2009 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 Ski-Doo Summit 550 Fan uses the 9003 bulb across both its high beam and low beam headlight positions for the 2003-2009 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments to serve both high and low beam functions within one housing.
The 9003 operates at 12 volts and draws 60 watts on the high beam filament and 55 watts 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 socket.
The 9003 designation follows the ANSI standard used in the United States and Canada, making it distinct from the functionally similar H4 bulb used under European ECE standards, despite sharing the same dual-filament halogen design.
Because the same 9003 bulb specification applies to both the high beam and low beam positions across all listed years, a single bulb type serves the entire headlight assembly on the Summit 550 Fan.