2020 Hyundai Sonata Hybrid

I noticed a strange smell almost like burning maple syrup in the garage for months. I thought it was just a different smell from Hybrid cars as I didn't have this used car very long. While driving at times the acceleration would stutter, again I thought this was just expected having never driven a hybrid car. Then on a trip a couple hours out of town someone stopped me on the road to tell me I was burning antifreeze and he could see white smoke coming from the car. I pulled over and didn't notice anything and continued driving but the heater wasn't working, it was blowing cool air despite the heat being on. I pulled into an auto parts store and got antifreeze in case. And then the overheating alert came on. I waited and filled it up and made an appointment at the dealer. They diagnosed it as a a blown gasket and a bad catalytic convertor and replaced all of that. After bringing it home I continued to lose coolant even with a two mile ride, I went from Max fill to half way between max and min. Clearly the problem wasn't the gasket or the catalytic convertor. Others have shared similar experiences online and had to have many parts replaced. The coolant tank, the EGR cooler (?), etc. I don't know what the problem is but something is wrong with these cars.

I have had the same issue 3 separate times related to the coolant system. The first time happened January 2021. I was driving on the highway and I noticed that when the car switched from electric to fuel a large plume of white smoke came out of the exhaust and then the engine overheating message started. I checked the coolant tank and it was completely empty. I managed to get some coolant in the car and get to my destination. I checked the coolant tank again and all the coolant that had been put in was gone. I immediately had the car towed to the dealer. They found the issue was a leak near the muffler and eventually replaced that and other gaskets. In May 2022, I noticed again that when I switched from battery to fuel on acceleration that there was a plume of smoke coming out of the exhaust and my coolant was very low. Brought to the dealer and they confirmed again there was a leak but this time with the EGR cooler and associated parts. In December 2022, I had just gotten an oil change from the dealer and they gave me a clean check up. The next evening I was on the highway again and I received the engine overheating message. I was able to get to the dealer the next morning after refilling the coolant twice. I provided them with the previous paperwork from the other two fixes. They confirmed again that the leak was happening with the muffler so they replaced more parts. In all I have for over 3 months fixing the same issue. I posted on Reddit to see if others have had the same issue and slowly more and more people with the same model year or the year after are reporting the same problems as seen https://www.reddit.com/r/Hyundai/comments/uhx7lf/coolant_leak_through_exhaust_on_2020_sonata_hybrid/?utm_source=share&utm_medium=web2x&context=3 Every time it's happened it's been covered under warranty but my concern is that it happens outside of the warranty and I will be on the hook for an expensive repair or forced to a new vehicle.

My car is a Hyundai sonata hybrid (non plug in) 2020. the issue I have is that when the car transitions from electric motor to the gas engine there can be a small delay resulting in the car not picking up and causing me to almost get hit in different scenarios. (I have not had this checked with a mechanic, Also there was no warning signs from the car indicating that there was a issue)

Check engine light came on and I contacted the dealer. Took 6 weeks to get an appointment and they advised that a module needed to be replaced giving me the impression it was a computer chip. The car has been sitting at the dealer since February 22, 2022, and they have been very cooperative including providing me with a free loaner to use. Unfortunately, they state that the part is not available (#HY25600-2J001 Thermal Management Module). Finding that this is not a unique failure as it is appearing inn 2020, 2021 models as well as some 2022 Hyundai models. Finding OEM part for sale on EBay, Amazon and even on the Hyundai parts website.

The contact owns a 2020 Hyundai Sonata. The contact stated while parking the vehicle and pressing the power button, the vehicle continued running. The contact was able to turn off the vehicle by repeatedly pressing the power button. The contact stated no warning light was illuminated. The vehicle was not taken to a local dealer. The manufacturer was not informed of the failure. The failure mileage was approximately 12,000.

DRIVING ON DRY ROAD, IN MIDDLE LANE OF THREE LANES GOING 65 MPH. SUDDENLY, RIGHT REAR TIRE "POOFED" BUT I KEPT CONTROL, STARTED TO LOOK RIGHT TO GET OFF ROAD. TOOK FOOT OFF GAS, DID NOT PUT ON BRAKE. SUDDENLY, LEFT REAR "POOFED" AND THEN AN EXTREMELY LOUD-METAL ON METAL- SOUND OCCURRED BACK LEFT AND MY CAR JACK KNIFED INTO THE PASSING , FAST LANE. A DUMP TRUCK TRAVELING IN THAT LANE STRUCK ME, FRONT END AND MY DOOR. THE TRUCK HIT ME AND I ROLLED INTO THE GRASSY MEDIUM, ROLLING OVER SEVERAL TIMES. THE SAFETY DEVICES WORKED FABULOUSLY AND MY ONLY INJURIES WERE FROM THE SEAT BELTS WHICH SAVED MY LIFE. I AM LUCKY TO BE ALIVE AND I HOPE THIS DOESN'T HAPPEN TO SOMEONE ELSE. I WAS IN ICU FOR 5 DAYS AND HOSPITAL FOR A TOTAL OF 9 DAYS, I AM WILL BE RECOVERING AT HOME FOR MONTHS. I WOULD LIKE IT INVESTIGATED THAT EITHER A MECHANICAL ISSUE OR TIRE ISSUE CAUSED THE ACCIDENT. I ONLY HAD 2300 MILES ON THE CAR.*DT*JB