NHTSA Complaint #11646046 — 2018 FORD FUSION

At 135,815 miles, my 2018 Ford Fusion SE experienced a sudden transmission failure while driving, with no prior warning signs. The vehicle was towed to Certified Transmission, where technicians confirmed: Transmission fluid level was correct but black/degraded. Multiple failure codes were present. Transmission pump whined and stopped functioning. Diagnosis: Internal transmission failure (6/17/2024). The shop stated this issue is common in these transmissions. The entire transmission had to be replaced. At 141,164 miles, just 5,349 miles later, the engine shut off on the highway while driving, again with no warning lights. After pulling onto the shoulder, it restarted after 10 minutes but was smoking heavily. Coolant was critically low in the reserve tank. Diagnosis: Cracked cylinder head due to coolant intrusion, a known defect in 1.5L EcoBoost engines. I contacted Ford Customer Care about CSP 21N12, but they refused assistance since my vehicle exceeds 84,000 miles, despite this well-documented defect. Safety Concerns: Unexpected transmission & engine failure while driving creates a serious risk. Engine shutoff on the highway could have led to an accident. Coolant intrusion in 1.5L EcoBoost engines is a known issue, yet Ford has failed to notify all owners. This issue affects many owners and creates major safety risks. I urge the NHTSA to investigate and consider a mandatory recall to prevent further incidents.