A few things. First, it will be void if the vehicle is sold or traded to an unauthorized Porsche dealer. As well, damage from neglect can void the warranty, along with any service performed outside of an authorized Porsche service center. Unauthorized modifications may also void your Porsche CPO warranty. As well, any damage or parts failure caused by racetrack driving will not be covered, and if it was not a Porsche-sponsored event, it might void the warranty.