The contact rented a 2023 Tesla Model 3. The contact stated that while testing the collision avoidance system the vehicle was moving at 2 mph and the brake pedal was not depressed the collision avoidance system did not activate. The vehicle collided with another vehicle. The air bags did not deploy. A police report was filed. The manufacturer was notified of the failure. The failure mileage was approximately 30. The VIN was not available.