INFINITI M37 Back Up Light Bulb Size

The INFINITI M37 back up light utilizes a 921 bulb size for the rear illumination system. Data for the specific component covers the period from 2011 through 2013.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2011-2013	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

Other Locations

Additional Notes

The INFINITI M37 uses the 921 bulb for its back up light across the 2011-2013 model years.
The 921 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized industry standard used across the United States and Canada.
The 921 bulb uses a wedge-style base, designated T15, which refers to a tubular glass envelope roughly 15/8 of an inch wide that is held in its socket by the tension of the base contacts rather than by a bayonet or screw mechanism.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive electrical systems.
Because the 921 is an ANSI-standardized wedge bulb, it is broadly interchangeable with other bulbs sharing the same T15 wedge base and matching voltage and wattage ratings, provided the physical fit within the housing is confirmed.