Scion tC Parking Light Bulb Size

The Scion tC parking light requires a 168 bulb size for the lighting system. Available information covers the period from 2005 through 2016 for the specified vehicle components.

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
2014-2016	168
2005-2010	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The 168 bulb is the sole parking light bulb size listed across all model years of the Scion tC covered in these specifications.
The 168 designation follows the ANSI standard recognized in the United States and Canada, placing it within a defined and regulated classification system for miniature automotive bulbs.
This bulb uses a T10 miniature wedge base, a base type that relies on the wedge shape of its glass envelope to seat directly into a socket without a separate metal base or pins.
Operating at 12 volts and 4.9 watts, the 168 sits at a low wattage output, consistent with its role in parking light applications rather than high-intensity functions such as headlighting.
The Scion tC carries this specification across 2005-2010 and 2014-2016, with the 168 bulb applying uniformly throughout both production periods.
Because the T10 wedge base is shared by several bulb types with differing wattages, substituting a bulb of a different wattage rating into a socket designed for the 4.9W 168 may not be electrically appropriate even if the base physically fits.