I bought my 2013 981 Boxster as a CPO in 2015. Both door panel tops warped, and were replaced under warranty in 2016. One headlight delaminated and was replaced in 2016 as well, and recently I noticed the other headlight is delaminating as well. I asked the Porsche dealer, and they said they would not replace it, as the CPO expired in Aug 2019... I just noticed one of the door panels is again warping as well. The entire time the car was under CPO, the dealer said "as long as we notate on your records that there is any issue, we can get Porsche to fix it even after the CPO is expired" - which clearly isn't the case. Very disappointing - this is how Lexus ultimately steals the show from the Europeans...
And - my car currently has 38k miles, has always been garaged, never been in a car wash, never been polished with any buffer, and rarely driven in the rain...