The Triumph America high beam and low beam headlight bulbs both utilize a 9003 size. The replacement chart covers vehicle production spanning 2002 to 2016.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Triumph America uses the 9003 bulb for both high beam and low beam headlight functions across all model years from 2002-2016.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both the high beam and low beam functions within one housing.
The 9003 operates on a 12-volt electrical system and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament.
The 9003 uses a P43t base, which is a three-pronged bayonet-style mount that physically locks the bulb into the headlight housing and ensures correct filament alignment.
The 9003 designation follows the ANSI standard used in the United States and Canada, distinguishing it from the internationally designated H4 bulb, which shares the same dual-filament halogen construction and wattage ratings but uses a slightly different base configuration and is not always a direct drop-in substitute.
Because the same 9003 bulb size is specified for both the high beam and low beam positions across the entire 2002-2016 model range of the Triumph America, the headlight assembly relies on a single replaceable bulb rather than separate units for each beam function.