INFINITI G37 Back Up Light Bulb Size

The INFINITI G37 back up light requires a bulb size of 921 for proper installation and function. Data for the specific component covers the range from 2008 to 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
2008-2013	921

Bulb Specifications

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

Other Locations

Additional Notes

The INFINITI G37 uses the 921 bulb for the back up light across all listed model years, spanning 2008-2013.
The 921 is classified as a T15 wedge-type bulb, meaning it connects directly into a socket via a tapered plastic base rather than using metal pins or a bayonet fitting.
The 921 operates at 12 volts and 16 watts, which is consistent with standard automotive electrical systems.
The 921 designation follows ANSI standards, indicating the bulb conforms to specifications recognized across the United States and Canada.
The T15 designation refers to the bulb's tubular shape, with the number indicating its width in eighths of an inch, placing it in a relatively compact form factor suited for tight tail lamp assemblies.
Because the 921 is a wedge-type bulb, it is not interchangeable with bayonet-base or pin-base bulb types even when wattage or voltage ratings are otherwise similar.