Nissan TITAN Trunk Bulb Size

The Nissan TITAN trunk utilizes bulb size 158 and bulb size 12961 for illumination purposes within the rear storage area. Available information covers the period from 2004 through 2021.

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
2021	158
2004-2015	12961

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W.	158
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The 12961 is the most frequently specified trunk bulb across the Nissan TITAN lineup, covering model years 2004-2015.
The 12961 is a Philips part number designation for a miniature wedge bulb in the T10 form factor, rated at 12 volts and 5 watts, with a W2.1x9.5d base.
The W2.1x9.5d base is a standardized wedge-type socket where the numerical values describe the contact width and pin spacing, ensuring a specific physical fit within the socket housing.
The 2021 Nissan TITAN uses the 158 bulb, which is an ANSI-standardized designation valid in both the United States and Canada, also in the T10 form factor but rated at 3 watts rather than 5 watts.
Although both the 158 and the 12961 share the T10 miniature wedge form factor, their wattage ratings differ, with the 158 drawing 3 watts and the 12961 drawing 5 watts.
The wattage difference between the two bulb types means they are not directly interchangeable without accounting for the variation in power draw, despite sharing the same physical form factor.
Both bulb types operate on a 12-volt circuit, which is consistent with standard automotive electrical systems.