The Moto Guzzi California 1400 uses an H3 bulb size for high beam headlight operation and an H7 bulb size for low beam headlight operation. The replacement chart covers 2013 through 2018 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Moto Guzzi California 1400 uses two distinct bulb types across its headlight system: the H3 for the high beam and the H7 for the low beam, with both fitments remaining consistent across the 2013-2018 model years.
Both the H3 and H7 are single-filament halogen bulbs operating at 12V and 55W, meaning neither bulb handles more than one lighting function within its housing.
The H3 uses a PK22s base, while the H7 uses a PX26d base. These two base types are physically incompatible with each other, so the high beam and low beam positions do not accept the same bulb.
Both bulb types conform to ECE standards, which govern lighting equipment across Europe and much of the world, and both also carry approval for use in the United States and Japan.
Because the H3 and H7 share identical voltage and wattage ratings, the difference in base design is the primary factor preventing cross-fitment between the two headlight positions.