I recently heard a gurgling noise coming from behind my dashboard,smelled coolant in the engine compartment and noticed a low coolant level the other day. After four days at the dealership and overnight pressure testing the cooling system, dye tracing, camera scoping the cylinders and checking the plugs,the dealer could not find any leaks. They pulled two brand new K5’s off the lot and tested them as well and found the same issues. They sent all the information on all three cars to Kia corporate who came to the conclusion that for the time being this coolant smell and intermittent noise is inherent to this model. They topped off my coolant and told me to keep an eye on and see if it persists. Someone on another forum that works at a Kia dealership also said that all of their new K5’s are smelling of coolant in the engine compartment for some reason. Just wanted to give everyone a heads up in case you experience this in the future.