The Ferrari F12tdf high beam and low beam headlight bulbs both utilize a D3S size. Replacement bulb specifications for the F12tdf are documented in a chart covering 2016 to 2017 production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
ECE standard (Europe & worldwide). Mercury-free HID (xenon) discharge bulb with PK32d-5 base and integral ignitor, for projector-type housings. 42V, 35W.
The D3S is a high-intensity discharge (HID) bulb type that operates within a xenon gas-filled quartz arc tube, producing light through an electrical arc rather than a heated filament.
The Ferrari F12tdf uses the D3S bulb for both high beam and low beam headlights across the 2016-2017 model years.
The D3S designation follows the standard IEC/ECE bulb classification system, where "D" denotes a discharge bulb, "3" identifies the specific arc tube design, and "S" indicates a single-piece integrated igniter and burner construction.
The shared D3S fitment across both beam functions in the F12tdf indicates the use of a projector-based headlight system, where a single bulb per housing serves dual beam roles through mechanical or optical switching.
The D3S bulb is not interchangeable with D1S or D2S types despite their physical similarities, as each series operates at different voltage and ignition requirements tied to specific ballast designs.
The integrated igniter in the D3S differentiates it from the D3R variant, which shares the same electrical specification but carries a UV-blocking coating intended for open-lens headlight housings rather than projector lenses.