The INFINITI M37 high beam and low beam headlight bulbs both utilize a 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 a high-intensity discharge (HID) xenon type operating at 85 volts and 35 watts, which places it in the low-wattage, high-output category typical of factory xenon systems.
The INFINITI M37 uses the D2S specification for both the high beam and low beam headlight positions across the 2011-2013 model years.
A single bulb type serving both beam functions indicates the M37 uses a projector-type housing with a mechanical shield or solenoid to switch between beam patterns rather than separate bulb units.
The D2S bulb features a P32d-2 base, which is a keyed bayonet-style fitting designed specifically for projector housings and is not physically compatible with reflector-type housings.
D2S bulbs require an external ignitor to generate the high-voltage arc needed to strike the xenon discharge, meaning the ignitor is a separate component from the bulb itself.
The D2S designation follows ECE (Economic Commission for Europe) standards, indicating the bulb specification is recognized internationally rather than being limited to a regional market standard.
The D2S type should not be substituted with D2R bulbs despite sharing the same P32d-2 base, as the D2R variant includes an internal coating intended for reflector housings and produces unwanted glare when used in projector optics.