The Polaris FST SwitchBack uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production years spanning 2006 to 2007.
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. Its base type is P43t, a bayonet-style fitting common in automotive and powersports lighting applications.
The 9003 designation follows the ANSI standard recognized in both the United States and Canada. It is functionally equivalent to the H4 bulb used under international standards, though fitment interchangeability between the two designations depends on the specific socket and housing design.
The Polaris FST SwitchBack uses the 9003 bulb for both the high beam and low beam headlight positions across the 2006-2007 model years. Because a single dual-filament bulb serves both functions, each headlight housing requires only one bulb rather than separate units for each beam mode.
The shared 9003 specification across both beam positions and both model years means a single bulb type covers all headlight replacements for the 2006-2007 FST SwitchBack, with no variation by year or beam function.