One problem related to engine exhaust system has been reported for the 2016 Jeep Wrangler. The most recently reported issues are listed below.
Engine oil cooler fail, extreme fire hazard. Small amount of oil found on driveway while parked, attempted to locate source by starting engine. Oil flooded out of the engine, streaming down the engine to the frame. Had my wife driven the Jeep to work it would've probably caught fire once the oil reached the exhaust.