Before you begin
This quick and easy guide will help you replace the cabin air filter of a Scion xA 2004-2006 automobile. The cabin air filter in a car plays an important role in the safety of the driver and its passengers. The filter removes dust, pollen, and other particles from entering the cabin. A cabin air filter will need to be changed every 20,000 miles, once a year, or if there is a moldy odor coming from the car's air vents. This replacement will take 10-15 minutes and does not require any tools.