Toyota Tundra Map Light Bulb Size

The Toyota Tundra map light utilizes bulb sizes 168, 194, and DE3175 across various production periods. Available information covers a span of time starting from 2000 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
2018-2021	168
2007-2013	168
2005-2006	194
2000-2004	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The Toyota Tundra map light uses three distinct bulb types across its model years: the 168, the 194, and the DE3175, all of which conform to ANSI standards applicable in the US and Canada.
The 168 bulb is the most widely specified type, covering the 2007-2013 and 2018-2021 model years. It is a T10 miniature wedge bulb rated at 12V and 4.9W.
The 194 bulb is also a T10 miniature wedge type and operates at 12V, but it carries a lower wattage rating of 3.78W compared to the 168. It is specified for the 2005-2006 model years.
Although the 168 and 194 share the same T10 wedge base form factor, their wattage ratings differ, which means they are not electrically identical and substituting one for the other may affect light output.
The DE3175 is a festoon-style bulb with a 31mm length and end-cap contacts, a construction that is physically distinct from the wedge base of the 168 and 194. It is specified for the 2000-2004 Toyota Tundra map light position.
Because the DE3175 uses end-cap contacts rather than a wedge base, it is not interchangeable with either the 168 or the 194, despite all three operating on a 12V circuit.