Genuine OEM Mazda Left Rear Door Centre Channel, part number GHK173602B. This channel is an integral part of the door assembly, specifically designed to guide and support the window glass as it moves up and down within the door frame. It is located on the left rear door. Manufactured from durable materials, it ensures smooth and consistent window operation. Genuine OEM parts provide the precise contour and material properties necessary for reliable window sealing and movement.