Read a few times they can start leaking & mine is (I think) at the right rear corner but the seal still looks good yet. Not sure where the EXACT leak is coming from.

What wears out?

Most likely the leak is coming from the seal around the tail lights. You can pull the light and look for dirt around the seal LIP. There should be none. ;You can use silcone RTV or any other sealant that does not dry hard.

Most likely the leak is coming from the seal around the tail lights. You can pull the light and look for dirt around the seal LIP. There should be none. ;You can use silcone RTV or any other sealant that does not dry hard.

yup i thought the same too and it was coming from the tail light seal. those things are only made of foam so they can ?deteriorate? fast.