One problem related to wiper has been reported for the 2016 Porsche 911. The most recently reported issues are listed below.
The front windshield and rear window glass seals have failed. Black tar like material flows and spears the windows. Especially bad when driving during summer months. Vehicle only has 6200 miles. Is out of warrenty. Dealer says repair costs at my expense. Contacted Porsche north America customer assistance. They also said they would not stand behind known defect. Many defects reported and corrected by Porsche when under warrenty.