NHTSA Complaint #11529047 — 2013 HYUNDAI SONATA

My nephew purchase a 2013 Hyundai Sonata in November 2022. Drove lease than 4 months and motor locked-up. My wife nephew purchase a 2016 Hyundai and his motor locked-up as well. Both took their vehicles to CMA Colonial Hyundai in Chester Virginia. However, the nephew with the 2016 got a new engine from Hyundai free of charge. The nephew with the 2013 Hyundai Sonata was informed that the Hyundai will not replace his engine due to like of maintenance by previous owner. Subject vehicle has been at Colonial Hyundai about three months now. During my research from other mechanics Hyundai have had many problems with engine locking up. My nephew reported the car lost power and would not start. (?) what's when driving on major highway and loses power. Not sure if reported as a major problem across the United States.