Toyota Tundra Trunk Bulb Size

The Toyota Tundra trunk utilizes bulb sizes 168, 12961, and DE3175 across various production periods. Available information covers the specific time span starting from 2000 through 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
2006-2013	168
2000-2005	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The Toyota Tundra uses two distinct bulb types across its trunk bulb specifications: the 168 (T10 wedge) for the 2006-2013 model years and the DE3175 (31mm festoon) for the 2000-2005 model years.
The 168 bulb is a T10 miniature wedge type, operating at 12V with a rated power draw of 4.9W. It seats via a wedge-style base, meaning it has no separate metal contacts and is held in place by the socket walls gripping the glass envelope directly.
The DE3175 is a festoon-style bulb with a 31mm length and end-cap contacts. Festoon bulbs make electrical contact at both ends of the tube rather than through a base, which is a fundamentally different mounting and contact method compared to the T10 wedge.
Both the 168 and DE3175 are classified under ANSI standards applicable to the US and Canadian markets, indicating standardized sizing and interchangeability within those respective bulb families.
The two bulb types are not interchangeable with each other. The wedge socket used in 2006-2013 Tundra trunk applications is physically incompatible with the end-cap festoon format required in 2000-2005 applications.
The DE3175 designation specifies a 31mm festoon length. Festoon bulbs of different lengths, such as 28mm or 36mm variants, would not seat correctly in a socket designed for the 31mm specification.
Both bulb types operate on a 12V circuit, consistent with standard automotive electrical systems. The 168 carries an explicit 4.9W rating, placing it in the low-wattage range typical of interior courtesy and cargo lighting.