INFINITI QX70 Back Up Light Bulb Size

The INFINITI QX70 back up light requires a bulb size of 7440 for the specific lighting component. Available data for the bulb specifications covers the range from 2014 to 2017.

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
2014-2017	7440

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.	7440

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Additional Notes

The INFINITI QX70 uses the 7440 bulb size for the back up light across the 2014-2017 model years.
The 7440 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 7440 belongs to the T20 wedge bulb family, a designation that refers to its physical base style, which uses a wedge-shaped plastic base rather than a metal pin or bayonet fitting.
As a single-filament bulb, the 7440 is designed to perform one lighting function only, which aligns with its dedicated role as a back up light.
The 7440 operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles.
The bulb carries a 21-watt rating, which places it in the mid-range of incandescent automotive bulbs and reflects the output level typical for reverse lighting applications.
The T20 wedge base format of the 7440 is not interchangeable with bayonet-base or pin-base bulb types, even when wattage or voltage ratings may otherwise appear similar.