It can't be that difficult. I'm a work at a Chevrolet/Chrysler dealer, and the heated seat elements are always going bad on the Town & Country's. The covers are held on by a big plastic clip at the bottom front of the seat. Once that is undone, the cushion is velcroed to the cushion where the seams are. Unless it's like the our Chevy's, (they use hog rings to hold the seat cover to the cushion). If that's the case, you just need a pair of dykes and some hog ring pliers. I wouldn't think the Toyota seat would be much different. I don't know the banana scale, but it's not too difficult. OR, it could be a freakin' PITA!! It seems to me that the Japanese engineers make their products easy and pleasant to work on though.