INFINITI G35 Back Up Light Bulb Size

The INFINITI G35 back up light utilizes a 921 bulb size for the specific lighting component located at the rear of the vehicle. Data for the bulb specifications covers the range from 2003 to 2008.

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	921
2003-2005	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 sole backup light bulb size listed for the INFINITI G35 across the 2003-2005 and 2008 model years.
The 921 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard 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 eighths of an inch wide. This base type is inserted directly into a socket without a separate metal cap or pins.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
At 16 watts, the 921 falls within the lower-to-mid power range for incandescent automotive bulbs, reflecting typical output requirements for a backup light function.
The T15 wedge form factor is shared across a wide range of vehicle makes and models, which means the 921 bulb is broadly interchangeable at the socket level, though fitment into a specific housing still depends on the physical space available in the lamp assembly.
Because the 921 is an ANSI-designated part number rather than a proprietary one, equivalent bulbs sold under different brand names are expected to conform to the same voltage, wattage, and base specifications.