The contact owns a 2014 Ford Fusion. The contact stated while driving 10 MPH, the vehicle was shaking with a rattling sound coming from the engine compartment. A code was displayed on the instrument panel; however, the contact was unsure what the code referenced. The contact stated that the vehicle was not safe to drive. The contact stated that an independent mechanic inspected the vehicle and diagnosed that there was a coolant leak, causing the coolant and oil to mix that caused engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The mechanic informed the contact of NHTSA Campaign Number: 17V209000 (Engine and Engine Cooling); which was related to the failure experienced. The manufacturer was informed of the failure and confirmed that the VIN was not included in NHTSA Campaign Number: 17V209000 (Engine and Engine Cooling) and opened a case. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 188,000.