At 115,000 miles, had a total engine failure. The engine was a 3.5 twin turbo eco boost. Engine not repairable and would need replacing. The blue book of the vehicle was 15K. The engine replacement cost from Ford was 18K. Overheard the mechanic call these engines on the Explorer, EXPLODERS. Apparently this is common and should have been a concern, but not mentioned to the consumers. Any other details can received from Bill Utter Ford Denton Texas.