Nissan Xterra Back Up Light Bulb Size

Additional Notes

• The Nissan Xterra uses the 921 bulb size for the back up light across all model years from 2000 to 2015.
• The 921 is a wedge-type bulb, classified under the T15 designation, which refers to its tubular glass envelope size measured in eighths of an inch.
• The wedge base design means the 921 bulb is held in place by the socket itself rather than by a separate metal base with pins, which is a common trait of many automotive interior and exterior lighting positions.
• The 921 operates at 12 volts and draws 16 watts, figures consistent with standard automotive electrical systems.
• The 921 bulb conforms to ANSI standards applicable in both the United States and Canada, indicating a standardized specification recognized across North American markets.
• Because the 921 is an ANSI-standardized wedge bulb, it is interchangeable with other bulbs sharing the same T15 wedge base and compatible voltage and wattage ratings, such as the 912, though output levels may differ slightly between variants.
• The consistent use of a single bulb specification across all sixteen model years of the Xterra means that replacement parts sourced for any year within the 2000-2015 range will share the same socket and electrical requirements.