The Ski-Doo GTX 800 headlight bulb size specifications indicate that both high beam and low beam applications utilize a 9003 bulb size. The replacement chart covers 2006 to 2007 vehicle production years 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 9003 is a dual-filament halogen bulb operating at 12 volts, with a high beam output of 60 watts and a low beam output of 55 watts. It uses a P43t base, which is a bayonet-style fitting with a 43mm base width.
The Ski-Doo GTX 800 uses the 9003 bulb for both the high beam and low beam headlight positions across the 2006-2007 model years, meaning a single bulb type serves both lighting functions simultaneously through its dual-filament design.
The 9003 designation is an ANSI standard classification recognized in the United States and Canada. This standardization means the bulb specification is defined by a formal industry body rather than solely by the manufacturer.
Because the high beam and low beam share the same 9003 bulb, the two filaments within a single unit are responsible for switching between output levels. A failure of one filament results in the loss of only that beam mode, while the other remains functional.
The P43t base is not universally interchangeable with other base types. Bulbs sharing similar wattage or voltage ratings but carrying a different base designation are not direct replacements for the 9003 in the GTX 800 headlight housing.