NHTSA Complaint #11427293 — 2017 HYUNDAI ELANTRA

I noticed the car losing power (2017 Elantra) took it to my local mechanic and got a misfire code on coil 3. Replaced it and the next day took a long trip to New Jersey, the car stalled at low speed with the CEL on pulled to the side restarted the car and proceeded to drive the rest of the way. I felt unsafe as the engine felt like it was struggling. On the way back I decided to tow it back to NY. I drove it the next day to my mechanic and he said there were no stored codes, he drove it and said he could do nothing. I drove it the next day and the same problem happened, luckily on a side street. Took it back to him and made him drive it around for a 4 day period nothing happened. My son drove it and the same issue happened luckily on a side street. I then took it to the Hyundai dealer and they said they got a misfire code. They replaced the remaining coils, changed the engine coolant and cleaned the fuel injection system. Maybe me wait practically 2 weeks with no loaner. Drove the car and the same issue occurred. Again luckily on a side street. I called my mechanic and he said drive locally and if it happens to call him so he will hook up a scanner to get a code. Right in my neighborhood the same thing happened so I called him and he was unable to get a code, he thought it could be either cam or crankshaft sensor, he tried both and the stall occurred when he was driving, he then changed the MAP sensor and drove it for 30 minutes without an issue. I went away for 5 days and came back and drove the car which seemed fine, but the same problem happened. This is a dangerous problem and feel unsafe driving this car. It has only 46.000 miles on it. I have a case opened with corporate and waiting for them to contact me.