One problem related to radiator has been reported for the 2011 Porsche Cayenne. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Porsche Cayenne based on all problems reported for the 2011 Cayenne.
While driving on the road in a remote national park, the tubing that returns coolant to the engine block from the radiator on my 2011 Porsche Cayenne s completely blew apart. This aluminum to aluminum tubing connection appears to have been held together exclusively by a thin, incomplete ring of epoxy glue. This is grossly substandard engineering for any such vital connection within the engine. Porsche has neglected to repair this known issue in model years such as mine, but has changed its design in the subsequent model years (likely because they realized this was dangerous and substandard engineering). They have not sent out any bulletin or recall to advise drivers of this defective construction or preemptively repair it. I was left stranded in a desert where I had to walk for hours to get help and had to have $1000 tow to the nearest city, all because of this dangerous design and construction of which Porsche is already aware.