The contact owns a 2023 Land Rover Range Rover. The contact stated that while driving at an undisclosed speed, the vehicle jerked abnormally. There was no warning light illuminated. The vehicle was taken to the dealer; however, no cause for the failure was found. The vehicle was not repaired. The contact stated that the failure persisted. In addition, the contact stated that the rear passengeras side door failed to latch as intended, and there was sand and leaves from the outside enter the vehicle due to the failure. The vehicle was taken to the dealer; however, no cause for the failure was found. The contact stated that a trim piece was replaced. The contact stated that the failure persisted. The manufacturer was not made aware of the failure. The failure mileage was unknown.