A new diesel engine option lends the 2009 BMW X5 an addictive driving quality, or so says Cars.com reviewer Kelsey Mays. With impressive mileage to go along with its fun yet comfortable ride, the BMW X5 has to be a winner, right? Not so fast: There’s always the price tag to consider. Falling in the neighborhood of $50,000, Mays wants the X5 to justify the bounty you’ll have to cough up to drive one. Read Mays’ full review to find out if the X5 can earn his recommendation.