Scion xD high beam and low beam headlight bulbs both utilize a 9003 size. The replacement chart covers 2008 to 2014 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Scion xD uses the 9003 bulb for both high beam and low beam headlights across all model years from 2008-2014.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 60W for high beam output and one rated at 55W for low beam output.
Because both headlight positions share the same 9003 bulb, one bulb type serves the entire headlight assembly on the Scion xD.
The 9003 bulb operates on a 12-volt electrical system, which is standard for passenger vehicles.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm flange that locks the bulb into the headlight housing.
The 9003 designation follows ANSI standards recognized in the United States and Canada. It is functionally equivalent to the European H4 bulb, though housing fitment between the two types is not always interchangeable due to base tab differences.