Purchased a 2013 Cayenne Porsche gts with 67K miles on it. Noticed a kind of thumping sound when accelerating, usually appearing at 3K rpms. Vehicle shudders and almost feels like the transmission is slipping. Took the vehicle to a mechanic to diagnose the fault and they immediately knew what it was, engine transfer case failure. This is due to a design flaw allowing water into the transfer case that Porsche is aware of and yet to address. On some occasions Porsche will pay for the $5K repair but the part is still replaced with a transfer case with the same flaw. Transfer case failure can lead to a sudden lose of power and potentially cause death or serious injury if someone is traveling at highway speeds. Highly recommend addressing this with a recall for 2013 and 2014 Cayennes. I have experienced sudden lose of power due to transfer case failure, neatly resulting in a highway collision.

- Frankfort, KY, USA

When accelerating the vehicle sputters and catches. This is extremely dangerous if trying to accelerate on a highway or should you need to accelerate to avoid a collision. My vehicle was bought brand new and currently only has 23,600 miles on it. This should not happen to a car with very low mileage. This issue happens while turning, while on the highway, while in reverse, and while on a city street. I took the car to Porsche and they identified that the car needs a new transfer case. This is unacceptable as this is extremely dangerous. This issue seems to have happened on 100S of Porsche.

- Houston, TX, USA

At 52361 mileage, found oil leaking from the engine. The front engine cover is leaking and will need to be resealed. Engine will need to be removed and alignment will be necessary due to disruption of sub frame and suspension components.

- Evanston, IL, USA

There is common problem! the engine chain rattling sound when engine starts vehicle developed problem after software update. The vehicle jerks and does not go smoothly on low rmp 1500. The second hand on the clock falls down.

- Buffalo, NY, USA

The Porsche Cayenne diesel is designed to not restart when the adblue exhaust chemical is too low. This seems reasonable. However, the vehicle is also designed to not restart when the adblue reaches a low point, even when it is refilled to full capacity. According to Porsche the vehicle must be brought to an certified Porsche dealership for this to be reset, so the car can be driven. Again, this occurs even when the adblue if refilled to full capacity. This seems to be a potentially dangerous and/or expensive situation should the adblue reach this low point and the vehicle is a significant distance from a certified Porsche dealership.

- Grand Rapids, MI, USA

I experienced a similar problem with my 2013 Cayenne S that was previously investigated (PE13-009) by the NHTSA in the Porsche 911. While my wife was driving on a highway the coolant hose completely separated from the housing causing the car to rapidly overheat without warning. Excessive smoke forced my wife to pull over and to exit the vehicle with 2 small children in an unsafe area of the highway. A Porsche service facility diagnosed the vehicle and replaced the component at a cost of $5,343.56. The vehicle was 4.5 years old at the time of the repair. In researching the issue I found numerous similar complaints online and found a response from Porsche relating to PE13-009 dated 9/17/2013 (attached). In Porsche's response to question 10, they claim that the adhesive application was automated and there were no further modifications or changes planned. My understanding is that they subsequently began threading the part in question instead of simply using adhesives. In response to question 13C Porsche listed only 2011 to 2014 Cayenne models that use a similar coolant pipe connection method (adhesive) however it appears the Cayenne going back as far as 2007 has a similar connection based on internet complaints. In response to question 14A Porsche lists racetrack use and low or non approved coolant as contributing factors. In my situation the car is used more as a minivan than a race car. It has been serviced at all recommended intervals and only at Porsche service locations. Finally I'd like to point out that the Cayenne and panamera are both front engine vehicles as compared to the 911 that was initially investigated raising new concerns about the loss of traction from the leakage location. I would like to request the issue be re-examined based on the above and given there are far greater numbers of Cayennes on the road than the 911.

- Garden City, NY, USA