Three problems related to car stall have 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.
The bolts on the camshaft controller broke inside of my engine. When this happened, I was driving southbound on the 405 freeway in los angeles, CA. The car violently jerked and then stalled on the freeway. This almost caused a major accident, but thankfully everyone was able to avoid my car. I've been told by a few repair shops that the damage done by the loose bolts likely damaged the engines internal components and I will likely be needing a new engine or an overhaul of the existing engine.
Driving on highway when the car dramatically lost power and stalled, luckily I was close to an exit and managed to get off the highway. However there was an 18 wheeler behind me that had to brake hard to avoid hitting me. I got to the bottom of the exit ramp and the car was barely running. Was able to get it back to the dealer (which was only 1/4 mile away) the problem was the camshaft adjust bolts on bank #1 sheared. This is a known defective part and problem with all Porsche v8 engines from 2011-2012.
When rolling slowly (<15mph) 1-2 second stall/bog after pressing accelerator before car accelerates, creating a major safety issue esp when merging with traffic, changing lanes, etc. Porsche north America denies this is a problem after inspection and says its "performing to specification". Separately, several Porsche dealers have verbally acknolwedged and/or confirmed this issue and call it a "first year" hybrid model problem.