The Triumph Adventurer high beam and low beam headlight bulbs both utilize a 9003 bulb size. The replacement chart covers vehicle production spanning 1996 to 2002.
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 for the Triumph Adventurer across all listed headlight positions and model years.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam operation, which is why the Triumph Adventurer uses the same bulb size for both functions.
The 9003 operates at 12 volts 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, a standardized bayonet-style fitting that determines physical socket compatibility during replacement.
The 9003 is designated as an ANSI standard bulb recognized in the United States and Canada, distinguishing it from the functionally equivalent H4 bulb used under European ECE standards, which shares the same electrical characteristics but differs in base coding and regulatory classification.
The 9003 specification applies to the Triumph Adventurer across the 1996-2002 model year range without variation in either the high beam or low beam position.