One problem related to transmission gear slipping has been reported for the 2007 Toyota Prius. The most recently reported issues are listed below.
The contact owns a 2007 Toyota Prius. The vehicle was in parked in the driveway and another vehicle bumped into it causing the gear shift to move into reverse. The vehicle traveled over an 18 inch snow bank and crashed into a tree. The front and rear bumpers were damaged. There were no injuries. The vehicle was driven to the dealer. A representative from the manufacturer performed a diagnostic test and found that the gear shift being placed in and out of park several times caused the gears to slip into neutral and then into reverse. The contact confirmed that the vehicle was in park. The contact was not offered any assistance with the repair. The failure mileage was 44,000.