Battery died only a couple years after previous battery was replaced. Difficulty jump starting car too; nothing found in diagnosis, though.
6000 mi
Power memory seat buttons not working. Car was kept for additional day for diagnostic. No parts replaced, seat memory system was reset.
10000 mi
PCM 3.1 which was retrofitted by Porsche after delivery failed less than a year after it was installed (cost of install was over $5k USD). Unit rebooted constantly (every two minutes). Porsche tried to re-load the software on the unit and that failed. They tried to replace the unit with a new one and that didn't work either (they said that the complicated coding they need to do wouldn't work). In the process they marked up the leather dash with small indentations and scratches.
The dealer has spent the last two weeks "working with Porsche" on what to do and so far they don't know.
See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how
frequently 2016 Porsche Cayman problems occur, check out our car reliability stats.