The contact owns a 2023 Lexus ES 300h. The contact stated that while sitting idle with the engine powered off in a local parking lot, the vehicle suddenly began to roll back independently into the nearby underground garage and crashed into the rear end of another parked vehicle's front passenger-side bumper that was unoccupied. No warning lights illuminated. The air bags did not deploy. No injuries were sustained, and no medical attention was sought. A police report was not filed. The local dealer was not contacted. The vehicle was not diagnosed or repaired. In addition, the contact stated that a 3rd party inspector investigated the failure; however, the diagnosis was not available. The manufacturer was made aware of the failure. The failure mileage was approximately 32,186.