door opener. PartQualifier: door opener. Switch. A sensor that detects motion like a footsweep, then signals a module which then commands the liftgate to open. An electrical Switch that controls the motor that operates the latch for remote opening of the liftgate. Assembly, Back DO. Door. Control. Handle. Hatch Latch Release. Lift gate bezel. Liftgate Motion Sensor. Lock. Tail gate.