Figure on about 2 hours. That is about how long it took me the first time, others have indicated less. I could do it quicker the next time, but that should be a reasonable estimate. Here are some notes from a previous post that might be helpful.

First, the directions (Bay 13) say to cut the hog rings with a pair of diagonal cutters. Either you needed a bigger set of dikes or a bigger forearm than I possess to cut them. I just ended up opening them up with a pair of needle nose pliers and my dikes and then unthreading them. As to the note about gaining full range of motion after installing the new cable, I just ran the motor back a bit before I installed the new cable, and had full range of motion without having to 'bump' the motor after installing the cable. When putting the seat back together again, I used zip ties rather than the hog rings. I saw some reference to it somewhere, and it worked well. I used some short (about 3-inch) ones. They threaded in through the holes left by the hog rings quite nicely. I tucked the ends into the valley in the foam on the seat backs, and cut the ends off on the four along the bottom of the seats. This seemed a lot easier than putting hog rings back in. It will make it easier if I ever need to do the cable replacement again too. Good luck.