One problem related to engine has been reported for the 2006 Porsche Cayenne. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Porsche Cayenne based on all problems reported for the 2006 Cayenne.
Vehicle suddenly loses power ("throttle control" as the service rep puts it), usually while traveling at highway speeds. This causes sudden deceleration, creating issues for surrounding traffic. In each case if I floor the accelerator I can maintain approximately 25 mph to get to a side street, where I arrange for a tow truck. This vehicle has been in the shop three times for a total of a month, during it's first 6 months (14,000 miles) for this condition. Each time the Porsche dealer believes it has been fixed. Intermittent so hard to diagnose.