Two problems related to coolant leaking have been reported for the 2015 Kia Motor Sorento. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Kia Motor Sorento based on all problems reported for the 2015 Sorento.
Brought in for oil change, tech found a coolant leak, replace thermostat housing unit for $700, left dealer and next day coolant was pouring out as I drove. Retuned to shop and kia said there was a manufacturing issue with some heads and at the present time they are in the machine shop. Still don't know if it is covered by warranty on a car with only 57000 miles.
Vehicle has 85,940 miles on it and has a blown head gasket. I bought it in April and it has run fine. Took the vehicle in for a routine oil change and the technician noticed coolant leaking from the engine block by the connection point with the head gasket cover on the driver's side of the engine. This is not expected from a ~4 year old vehicle with < 100,000 miles that's only driven about 10 miles a day m-f on roads with speed limits below 45 and very little traffic.