My Santa Fe has twice had a fluid leak that dripped from the engine compartment to the floor mat on the left drivers side. I took it in to a Hyundai dealership to have it diagnosed and they came up with nothing, My son in law who repairs cars said its possible that it could be the heater core or head gasket but it cant be diagnosed without taking the dashboard completely off. Not sure what the fluid is but will take a sample of it if it keeps dripping to try and see what it is, antifreeze, oil, etc.

I fear this will continue you happen and Hyundai's warranty ends at 60,000 miles and we have 52,000 miles on the car now.