Competing among the latest trend of luxury compact crossovers, BMW introduced the x3 in 2003. The X3 offers comfort and luxury expected from a BMW, in a smaller, more fuel-efficient package. When it comes to safety, the BMW X3 joins the larger X5 as the Insurance Institute for Highway Safety (IIHS) top safety picks for 2008. During the first four years of ownership, BMW X3 drivers receive a 50,000-mile warranty and $0 maintenance program in addition to an unlimited mileage roadside assistance. The BMW X3 gets an estimated 23 mpg on the highway.