One problem related to engine exhaust system has been reported for the 2013 BMW X3. The most recently reported issues are listed below.
Engine seized at only 58k miles right at the airport, would not start again. It was later towed to the dealer and a new engine was replaced. 6 months later at 61k miles, huge plumes of white smokes is coming out of the exhaust. Drove to the dealer again and was informed that the turbocharger is broken.