The INFINITI G25 high beam and low beam headlight bulbs both utilize the D2S size. The replacement chart covers 2011 to 2012 model 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 D2S bulb is the sole bulb type specified for the Infiniti G25 across both the high beam and low beam headlight positions for the 2011-2012 model years.
D2S 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, which is the operating principle of traditional halogen bulbs.
The D2S bulb operates at 85 volts and 35 watts, a voltage level far above standard automotive electrical systems, which is why the bulb requires a separate external ignitor to initiate and sustain the arc.
The D2S designation is specific to projector-type headlight housings, and it is not interchangeable with D2R bulbs, which are designed for reflector-type housings despite sharing the same P32d-2 base and electrical ratings.
The P32d-2 base is a keyed fitting, meaning physical alignment tabs prevent incorrect bulb installation within the housing.
The D2S bulb conforms to the ECE (Economic Commission for Europe) standard, a regulatory framework used across Europe and numerous other markets worldwide to govern bulb output, color temperature, and safety.