One problem related to engine failure has been reported for the 2010 Ford Flex. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Ford Flex based on all problems reported for the 2010 Flex.
Major engine failure while driving 45mph. Engine has 108,000 miles. Now engine needs to be replaced. Engine just shut off while driving in traffic on us hwy 41 in land o lake FL, repair estimated at $6500.