Hi All - I was rotating my tires and as I was cleaning, I found a rubber cover/seal. I am not sure if it belongs to the 4Runner as I have equipment coming and going (warehouse) where I did the tire rotation. It's just that it wasn't there when I pulled the truck into the work space. It may have belonged to the floor jack or even the walkie-rider (motorize pallet jack) which I used to move the tools I needed to do the tire rotation.
If anyone may know or have seen this part on their 4Runner, please let me know. Thanks.