Interchange: blind spot alert (opt UKC), (LH rear bumper). BUICK LACROSSE 17 radar unit, blind spot alert (opt UKC), (LH rear bumper). MALIBU 17-18 blind spot alert (opt UKC), (LH rear bumper). CHEVROLET CRUZE 17 radar unit (blind spot alert), (RH quarter panel), ID 23401479.