The Triumph Rocket III Touring uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production years spanning 2012 to 2017.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 is the sole bulb type specified for the Triumph Rocket III Touring across both high beam and low beam headlight positions for the 2012-2017 model years covered in these specifications.
The 9003 is a dual-filament halogen bulb, meaning a single physical bulb contains two separate filaments: one rated at 60W for high beam output and one rated at 55W for low beam output.
The 9003 operates on a 12V electrical system and uses a P43t base, which is a bayonet-style mount with a 43mm collar width.
The 9003 follows the ANSI standard designation used in the United States and Canada. It is electrically and physically equivalent to the H4 bulb used under European ECE standards, though the designations differ by market.
Because the same 9003 bulb serves both the high beam and low beam positions on the Rocket III Touring, the headlight assembly uses a single-bulb, dual-filament design rather than separate bulbs for each function.
The H4 and 9003 share the same P43t base and dual-filament 60W/55W configuration, but substitution between the two designations may carry compliance implications depending on the regulatory market in which the vehicle is operated.