One problem related to coolant leaking has been reported for the 2017 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2017 Hyundai Sonata based on all problems reported for the 2017 Sonata.
My 2017 Hyundai Sonata with the 2. 4l gdi engine only has 14,689 miles as of today 18 September 2020. It is consuming too much oil and coolant. My engine oil is about 1 1/2 quarts low, with no oil leaks. I had the oil changed at 12,600 miles. Also, coolant is at low level and I haven't driven car much since April 2020 due to covid-19 shut down. No coolant leaks anywhere around the engine, housing or inside. I cannot figure why the oil and coolant are low. My last scheduled maintenance included oil and filter change as well as top off all fluids.