The Scion xB was introduced in mid 2003, as a 2004 model sought to capture an emerging youth market with a unique, practical, somewhat offbeat economy box. The EPA estimates fuel economy for the xB at from 30-31 MPG city to 34-35 MPG highway. Watch the Pre-Owned Vehicle Review for the 2004 to 2006 Scion xB to view JD Power Ratings for overall dependability, predicted reliability, overall performance and design, safety, and overall initial quality.