Ski-Doo MX Z 550 Fan high beam and low beam headlight bulbs both use 9003 size. The replacement chart covers 2003 to 2008 production years with 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 MX Z 550 Fan uses the 9003 bulb type for both its high beam and low beam headlight positions across the 2003-2008 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments that serve both the high and low beam functions within one housing.
The 9003 operates on a 12-volt electrical system 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 a regionally standardized specification rather than a proprietary or manufacturer-specific size.
Because the same 9003 bulb serves both the high beam and low beam positions, only one bulb type is required to service the entire headlight assembly on this model.