The Moto Guzzi V11 Quota uses an H1 bulb size for high beam headlight operation and an H3 bulb size for low beam headlight operation. The replacement chart covers 1999 to 2000 vehicle 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 V11 Quota uses the H1 bulb for the high beam headlight across the 1999-2000 model years.
The H1 is a single-filament halogen bulb operating at 12V and 55W, fitted with a P14.5s base and produced to ECE standards with approval in the US and Japan.
The low beam headlight position uses the H3 bulb across the same 1999-2000 model years.
The H3 is also a single-filament halogen bulb rated at 12V and 55W, but it uses a PK22s base rather than the P14.5s base found on the H1, making the two bulbs physically non-interchangeable despite sharing the same wattage and voltage rating.
Both the H1 and H3 are governed by ECE regulations, a lighting standard recognized across Europe and internationally, and both carry additional approval for use in the US and Japan.
Because the H1 and H3 share identical voltage and wattage ratings but differ in base type, substituting one for the other is not possible without a physical adapter or socket modification.