First of I want to apologize if this is already in another thread. I couldn't find anything about it. I was reading on edmunds.com about people who have a 4th gen 4Runner and engine compartment dirtness/corrosion. They were talking about holes in the fender well and getting plugs for the holes. Does anyone know anything about this? If so, does anyone have the part number for the plugs and approx. how many are needed to plug the holes. I am going to be moving up north and want to keep out as much winter road salt as possible. Thanks.