Toyota Tundra Courtesy Bulb Size

The Toyota Tundra courtesy light uses bulb sizes 168 and 194 depending on the specific version of the vehicle. Data for the bulb sizes covers the range from 2000 to 2010.

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
2010	168 (To 08/2010)
2007-2009	168
2000-2006	194

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

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Additional Notes

The Toyota Tundra courtesy bulb specifications cover model years 2000-2010, with two distinct bulb sizes used across that span: the 168 and the 194.
Both the 168 and 194 are ANSI-standardized miniature wedge bulbs sharing the same T10 base and 12-volt operating voltage, which means they are physically interchangeable in terms of socket fitment.
Despite sharing the T10 base, the 168 and 194 differ in wattage. The 168 draws 4.9W, while the 194 draws 3.78W, making them electrically distinct and not direct replacements for one another.
The 194 bulb is specified for the Toyota Tundra across model years 2000-2006, representing the longer of the two application periods covered in these specifications.
The 168 bulb applies to model years 2007-2010, with the 2010 application noted as valid only through August 2010, indicating a mid-year specification change for that model year.
The mid-year cutoff on the 2010 Toyota Tundra entry means that vehicles produced after August 2010 fall outside the scope of the 168 bulb specification listed here.
The T10 wedge base is a common automotive miniature bulb format, and both the 168 and 194 types are widely available as ANSI-standardized components in the United States and Canada.