INFINITI QX56 Back Up Light Bulb Size

The INFINITI QX56 utilizes a back up light with a specific 921 bulb size for the rear illumination system. Data for the specified vehicle covers the range from 2004 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
2004-2013	921

Bulb Specifications

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

Other Locations

Additional Notes

The INFINITI QX56 uses the 921 bulb size for the back up light across all available model years, spanning 2004-2013.
The 921 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 921 bulb uses a wedge-style base, designated T15, which refers to a tubular lamp body approximately 15/8 of an inch wide with a plastic wedge base that seats directly into a socket without a separate metal connector.
The 921 operates at 12 volts and 16 watts, consistent with standard automotive electrical systems.
The wedge base design of the T15 921 bulb means it is not interchangeable with bayonet-base or screw-base bulb types, even when wattage or voltage ratings are otherwise similar.
The consistent use of the 921 across the full 2004-2013 production span of the QX56 indicates a single fitment specification applies to all model years listed.