The Aprilia RS 250 high beam headlight uses an H3 bulb size while the low beam headlight requires an H1 bulb size. The replacement chart covers vehicle production years spanning 1996 to 2002 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 RS 250 uses the H3 bulb for high beam headlights across all model years from 1996-2002, making it the consistent high beam specification throughout the entire production run covered by these data.
The H3 is a single-filament halogen bulb rated at 12V and 55W, fitted with a PK22s base. It conforms to ECE standards and holds approval for use in Europe, worldwide markets, the United States, and Japan.
The low beam headlight on the RS 250 uses the H1 bulb across the same 1996-2002 model year span, running parallel to the H3 in terms of voltage and wattage at 12V and 55W.
The H1 bulb carries a P14.5s base, which differs from the PK22s base of the H3. Although both bulbs share identical voltage and wattage ratings, their bases are physically incompatible with each other, meaning the two types are not interchangeable between the high and low beam positions.
Both the H1 and H3 are single-filament designs, meaning each bulb serves only one lighting function. This is why the RS 250 requires two separate bulb types to cover both beam functions rather than a single dual-filament unit.
The ECE designation on both bulbs indicates compliance with United Nations Economic Commission for Europe regulations, a widely adopted international standard governing photometric and safety performance for automotive lighting.