Nissan TITAN XD Back Up Light Bulb Size

The Nissan TITAN XD back up light requires a 921 bulb size for proper installation and function within the rear lighting assembly. Available data for the specified component covers the period from 2016 through 2024.

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
2023-2024	921
2021	921
2016-2019	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 size for the Nissan TITAN XD across all listed model years.
The 921 is classified as a T15 wedge-type bulb, meaning it uses a wedge-shaped plastic base rather than a metal contact pin or bayonet fitting.
The bulb operates at 12 volts and draws 16 watts, which is consistent with standard automotive incandescent reverse light applications.
The 921 designation follows the ANSI standard recognized in both the United States and Canada, indicating a standardized specification for electrical and physical characteristics.
The T15 designation refers to the bulb's tubular envelope size, where the number 15 represents fifteen-eighths of an inch in width.
The 921 bulb is shared across the 2016-2019 and 2021-2024 model years of the TITAN XD, making it a consistent fitment across the listed production span.
Because the 921 is an ANSI-standardized wedge bulb, it is interchangeable with other bulbs sharing the same T15 wedge base, 12V rating, and 16W output, provided those substitutes meet the same electrical specifications.