The Piaggio Liberty 150 uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production years spanning 2018 to 2023.
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 across all listed model years and headlight positions for the Piaggio Liberty 150.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam operation, which accounts for its use in both headlight positions.
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 bayonet-style mount with a 43mm flange width, which physically determines socket compatibility.
The 9003 designation follows the ANSI standard used in the United States and Canada. It is electrically and functionally equivalent to the European H4 bulb, though the two designations reflect different regional classification systems.
The 9003 specification applies to the Piaggio Liberty 150 across the 2018-2019 and 2023 model years as listed.
Because the H4 and 9003 share the same filament configuration, voltage, wattage, and base type, aftermarket packaging may list either designation for the same physical bulb, though fitment should be confirmed against the P43t base specification.