One thing the mechanic pointed out, was that he always uses a small ty-wrap to secure the one-way washer on the linkage, where it connects to the door latch. Zoom in on the photo and you can see the washer held fast with the black ty-wrap. On my original linkage, this washer had backed out so much that it allowed the actuator plunger to extend to the side, instead of moving the linkage and opening the latch. The ty-wrap prevents this.