The Ferrari 599 GTB high beam and low beam headlight bulbs both utilize a D1S bulb size. The replacement chart covers 2007 to 2010 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 Ferrari 599 GTB uses the D1S bulb type for both high beam and low beam headlights across the 2007-2010 model years.
The D1S is a High-Intensity Discharge (HID) xenon bulb, meaning it produces light by passing an electrical arc through xenon gas rather than heating a filament.
D1S bulbs operate at 85 volts and 35 watts, which reflects the high-voltage ignition requirement typical of HID discharge technology.
The D1S standard includes an integral ignitor built directly into the bulb unit, distinguishing it from D2S and other HID types where the ignitor is a separate component.
The D1S uses a PK32d-2 base, a keyed connector format that physically prevents substitution with dimensionally similar but electrically incompatible HID types such as the D2S.
The D1S designation follows the ECE (Economic Commission for Europe) regulatory standard, indicating the bulb is certified for road use across Europe and other markets that adopt ECE regulations.
The D1S bulb is specified for projector-type headlight housings, which use a lens and reflector system designed around the precise arc position that the integral ignitor placement provides.