The Ski-Doo MX Z 550 X high beam and low beam headlight bulbs both utilize a 9003 size. The replacement chart covers 2006 to 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 9003 bulb is the sole bulb type specified across all headlight positions on the Ski-Doo MX Z 550 X, covering both high beam and low beam functions for the 2006-2009 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments: one rated at 60 watts for high beam output and one rated at 55 watts for low beam output.
Because both the high beam and low beam positions share the same 9003 bulb type, a single bulb physically handles both lighting functions rather than requiring two separate single-filament units.
The 9003 bulb operates on a 12-volt electrical system and uses a P43t base, which is a bayonet-style fitting with a 43mm flange used to secure and align the bulb within the housing.
The 9003 designation follows the ANSI standard recognized in both the United States and Canada, distinguishing it from the functionally similar H4 bulb used in international markets, which shares the same dual-filament design but carries a different designation under ECE regulations.
Although the 9003 and H4 are electrically and physically similar, substituting one for the other requires verification of base compatibility, as regulatory and manufacturing tolerances between ANSI and ECE standards can affect fitment.