Scion xD License Plate Bulb Size

Additional Notes

• The Scion xD uses two distinct bulb sizes for the license plate position across its production run: the 192 and the 168, both of which are ANSI-standardized miniature wedge bulbs of the T10 type rated at 12 volts.
• The 2008-2011 and 2012 Scion xD models use the 168 bulb, while the 2013-2014 models use the 192 bulb, meaning the license plate bulb specification changed at some point between the 2012 and 2013 model years.
• Although both the 192 and 168 share the same T10 wedge base and 12-volt operating voltage, they are not the same wattage. The 168 draws 4.9 watts, while the 192 draws 3 watts.
• The wattage difference between the two bulbs is a fitment consideration. Installing a 168 in a socket designed for a 192 would introduce a higher current draw than the circuit was specified for, and the reverse would produce a lower light output than intended.
• The T10 wedge base is a common format in automotive lighting, meaning physically similar bulbs from other ANSI designations may share the same base shape without sharing the same electrical rating, which makes wattage verification relevant when sourcing replacements.
• Both bulb types carry ANSI standardization for the US and Canadian markets, indicating that the specifications conform to a defined set of performance and dimensional criteria recognized across North American automotive applications.