On [XXX] I drove my Hyundai Kona from Louisville Ky to the Cincinnati area when my car started to stumble and I was able to pull off the highway in Florence, Ky. I tried to start the car but there was a very bad noise from the engine so I turned it off. I called the Hyundai service number and let them know what had happened. They had my car towed to a local Hyundai dealership. I was told by that dealership that my oil plug had fallen out and the engine seized. I had no indicator lights come on until the car lost power. The Hyundai dealership in Louisville has completed all my maintenance on my car since I bought it. I had my 50K maintenance done on [XXX} where my oil was changed. I was still under my mileage for an oil change. After talking with the local dealership they stated that my warranty will not cover the repairs and advised that teenagers have been vandalizing cars and that is likely what happened. They advised me to enter a claim with my car insurance company for vandalism. After researching this issue, I feel that this is a defect as the temperature that day was -5 and during my drive the oil pan expanded and the plug fell out. I had not seen any oil leaking from my vehicle until the engine seized. I am still working with the dealership but they are sticking to the vandal theory and that I will have to pay for the repair which they have estimated will be around 12K. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)