The INFINITI M56 high beam and low beam headlight bulbs both utilize the D2S bulb size. The replacement chart covers vehicle production spanning 2011 to 2013.
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 across all headlight positions on the Infiniti M56, covering both high beam and low beam functions for the 2011-2013 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.
The bulb operates at 85 volts and 35 watts, which reflects the high ignition voltage characteristic of HID technology alongside a relatively low steady-state wattage.
D2S uses a P32d-2 base and is designed exclusively for projector-type headlight housings, making it incompatible with reflector-style housings without modification.
The D2S specification requires an external ignitor to initiate the arc discharge, meaning the ignitor is a separate component from the bulb itself.
D2S conforms to ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide.
Because the M56 uses D2S for both high and low beam functions, the vehicle relies on a projector housing mechanism, typically a movable lens or shield, to switch between beam patterns rather than separate bulbs for each function.
The shared D2S fitment across both beam positions means a single bulb type serves the entire headlight assembly, though the high beam and low beam circuits remain electrically distinct.