Toyota Tundra Door Mirror Illumination Light Bulb Size

Additional Notes

• The 168 bulb is the sole bulb size listed across all model years in these specifications, appearing in the Toyota Tundra door mirror illumination position for 2007-2013 and 2018-2020.
• The 168 is classified as a T10 miniature wedge bulb, a designation that refers to its tubular glass envelope measuring 10 thirty-seconds of an inch in width and its wedge-shaped base, which requires no separate metal socket pins.
• The bulb operates at 12 volts with a power draw of 4.9 watts, placing it in the low-wattage range typical of interior and accent lighting applications rather than primary illumination.
• The 168 designation follows the ANSI standardization system recognized in both the United States and Canada, meaning the bulb conforms to a defined set of electrical and physical parameters shared across manufacturers.
• The T10 wedge base format is shared by several ANSI-coded bulbs, including the 194 and 147, which carry different wattage ratings. Substituting a visually similar T10 bulb without confirming the wattage risks mismatched power consumption for the circuit.
• The wedge base design of the 168 means retention is achieved by the base being gripped directly within the socket housing, so fitment depends on socket tolerance as well as the bulb code itself.