The vehicle is experiencing ongoing coolant loss with no visible external leak. The coolant level drops consistently and requires frequent refilling. The issue began around mid-mileage and has continued to worsen. The engine sometimes emits a coolant smell, and the temperature gauge rises more quickly than normal. Warning messages about high engine temperature have appeared during driving. The dealer inspected the vehicle but could not find an external leak and stated the condition was normal, even though the...
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coolant continues to disappear. No repairs have resolved the issue. Based on known problems with EcoBoost engines, an internal coolant leak or cylinder head defect is suspected, but the exact cause is UNKNOWN. This creates a safety risk because sudden overheating can occur while driving, which may lead to engine failure, loss of power, or stalling in traffic. The issue is ongoing and the vehicle is available for inspection upon request.