The Aprilia Tuono 125 uses an H3 bulb size for high beam and H1 bulb size for low beam headlight applications. The replacement chart covers 2004 to 2005 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Aprilia Tuono 125 (2004-2005) uses the H3 bulb for the high beam headlight and the H1 bulb for the low beam headlight.
Both the H3 and H1 are single-filament halogen bulbs rated at 12V and 55W, meaning each bulb handles only one lighting function, which is why the Tuono 125 requires separate bulbs for high and low beam operation.
The H3 bulb uses a PK22s base, while the H1 uses a P14.5s base. These two base types are physically incompatible with each other, so the bulbs are not interchangeable between the high and low beam positions.
Both bulbs conform to ECE standards and carry approval for use in the US and Japan, reflecting a broad international regulatory acceptance across major automotive markets.