Power seat noise - 2007 Toyota Avalon

I would suggest first looking under the seat. You are looking for anything wedged under it. Also look at the seat tracks ( steel rails that run along each side under the seat). Insure that nothing is stuck in the rails. If you don't see anything stuck anywhere under the seat you may have a bad motor. If you shop around you may be able to find a shop that will check it out for free. Ask before they look if the check is free or taken off the cost of the repair. Some places will tell you its free to check it out then charge you a diagnostic fee if you do not have them fix it.