Ford Flex Problems: 5 Issues Every Owner Should Know
2009-2019 model years ยท 1,120+ owner reports ยท Updated April 2026
According to Au7o's analysis of 1,120+ owner reports, the 2009-2019 Ford Flex has 5 documented known issues, with 3 rated critical. The most serious are Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage ($1,500-$7,000 repair), Electric Power Steering (EPS) Failure and Assist Loss ($300-$1,300 repair) and Brake Booster Check Valve Failure ($50-$600 repair). The most commonly reported issue is Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage with 480 owner reports. Across all issues, repair costs range from $30 to $7,000. DIY maintenance guides at au7o.io.