The contact owned a 2008 Honda Fit. The contact stated while driving 20MPH the vehicle lost all motor and electrical power; which resulted in the vehicle rolling back down the hill it was on and crashing into a fence. No airbags deployed. The vehicle was destroyed and towed to a local police lot and a report was filed. There were no physical injuries from the occupants of the vehicle. The contact stated no warning lights were illuminated. Upon investigation, the contact associated the failure with, NHTSA Campaign Number: 20V770000 (POWER TRAIN). The manufacturer was informed of failure and was currently awaiting a response. The failure mileage was approximately 200,000.