One problem related to loud engine noise has been reported for the 2006 Ford Escape Hybrid. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Ford Escape Hybrid based on all problems reported for the 2006 Escape Hybrid.
I experienced a catastrophic engine failure while highway driving @ 70 mph. There was a loud sound from the engine, then a "stop the vehicle safely now" warning, and the engine stopped functioning.