Scion tC Automatic Transmission Indicator Bulb Size

The Scion tC automatic transmission indicator requires a bulb size of 74 for the specific lighting component. Data for the bulb size covers the range from 2011 to 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
2011-2013	74

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74

Other Locations

Additional Notes

The T5 miniature wedge is the bulb type used for the automatic transmission indicator in the Scion tC across the 2011-2013 model years, with all listed entries specifying size 74.
The 74 bulb follows the ANSI standard recognized in both the United States and Canada, classifying it as a standardized part within North American automotive applications.
Operating at 12 volts and 1.4 watts, the 74 bulb draws very low wattage, which is consistent with its role as an instrument panel indicator rather than a lighting source.
The T5 designation refers to the bulb's tubular envelope width, measured in units of one-eighth of an inch, placing the glass envelope at approximately 5/8 of an inch wide.
The wedge base design means the bulb is held in its socket by the tension of the base itself rather than by a separate metal cap or bayonet pins, a construction common in instrument cluster applications.