One problem related to vehicle overheat has been reported for the 2010 Mazda CX9. The most recently reported issues are listed below.
Me and my husband were on our way home from work. The car suddenly overheated and we lost power on I-35, we were able to get the car to an exit and was nearly hit by another car due to loss of steering and power. We had the car towed to a Mazda dealership. There is engine coolant in the oil and we are told it needs a new motor.