INFINITI M56 Back Up Light Bulb Size

The INFINITI M56 back up light uses a 921 bulb size for the rear illumination system. Data for the specified lighting 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 921 bulb is the specified back up light bulb for the INFINITI M56 across the 2011-2013 model years.
The 921 is an ANSI-standardized bulb type, meaning its physical and electrical characteristics conform to a defined North American specification used in both the United States and Canada.
The 921 uses a wedge-style base, designated T15, which refers to a tubular bulb body approximately 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 bulb operates at 12 volts and draws 16 watts, which is consistent with standard automotive low-current incandescent reverse light applications.
The 921 shares its T15 wedge base with several related bulb types in the same family, such as the 912 and 906, though those alternatives carry different wattage ratings and are not confirmed interchangeable for this application without verifying socket and circuit compatibility.