Scion xB Fog Light Bulb Size

Scion xB front fog light bulbs use a 9006 size for this model. The replacement chart covers 2004 to 2006 vehicle production 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.

Front Fog Light

Years	Bulb Size
2004-2006	9006

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament halogen bulb with P22d base. 12V, 55W.	9006

Other Locations

Additional Notes

The 9006 is a single-filament halogen bulb operating at 12 volts and 55 watts, built to the ANSI standard recognized in the United States and Canada. It uses a P22d base, which is a push-and-twist locking base type designed to secure the bulb within the housing without additional fasteners.
The Scion xB uses the 9006 bulb across all listed front fog light positions for the 2004-2006 model years, indicating a consistent socket and wiring configuration across that production span.
The single-filament design of the 9006 means it serves one lighting function only, as opposed to dual-filament bulbs that handle two functions such as low and high beam from a single unit. In fog light applications, a single-filament bulb is standard practice.
The P22d base is not interchangeable with other common base types such as H11 or 9005, despite those bulbs sharing similar wattage ratings. Physical base differences prevent cross-fitting without modification.
Although the 9005 bulb shares the same 12V, 55W electrical rating as the 9006, its base tab is positioned differently, making it physically incompatible with a 9006 socket under standard fitment conditions.