Scion xB License Plate Bulb Size

The Scion xB license plate light requires a 168 bulb size for proper illumination of the rear vehicle identification area. Available data for the specified lighting component covers the production range from 2004 through 2015.

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
2008-2015	168
2004-2006	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 license plate bulb size specified for the Scion xB across all listed model years from 2004 to 2015, with the exception of 2007, for which no data is provided in these specifications.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a defined regulatory framework for miniature automotive lighting.
It belongs to the T10 miniature wedge form factor, a designation that refers to the bulb's wedge-shaped base, which seats directly into a socket without requiring a separate metal base or pins.
The 168 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
Its rated wattage of 4.9W places it in the low-power range typical of license plate and courtesy lighting applications, where heat output and current draw are kept minimal.
The T10 wedge base type is widely shared across many automotive lighting positions, meaning 168 bulbs are broadly available and physically compatible with other T10 socket housings, though electrical ratings should be matched to the intended application.