Ford 2.0L EcoBoost engine. 2017-2019 Fusion. Also, in 2 other Ford and Lincoln models. I bought 2019 Fusion used and car has just under 69000 miles. Due to a known engine defect there can be coolant intrusion into a cylinder. In my case #2 cylinder. See TSB # 22-2229 from Ford. Check engine light came on. took to dealer and replaced 1 ign coil and 4 spark plugs. Thought issue resolved until check engine light came back on. Returned to dealer and advise that engine needed replacement. If continued to operate engine could lock-up while driving thus creating a safety for myself and others on the highway. Ford knows of this defect caused by their design of the block.