Table 1 shows one common engine and engine cooling related problems of the 2017 Porsche Cayenne.
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling problems |
I am reporting a series of safety-related defects involving the electrical, cooling, and fuel systems of my 2021 Porsche Cayenne e-hybrid. The vehicle was initially brought to the authorized Porsche dealership due to an electrical system error, and the dealer kept the vehicle for an extended period. After approximately five months, the vehicle was returned to me without a clear explanation of the root cause or details of the repair. The very next day after receiving the vehicle, a coolant temperature warning appeared while driving, indicating abnormal engine overheating. This created an immediate safety hazard, as overheating can lead to sudden engine failure, loss of power, or a potential fire risk. I returned the vehicle to the dealership again for further repairs. Afterward, another serious issue occurred: because this is a hybrid vehicle, I went to refuel, but the fuel door would not open, and a fuel system error warning appeared again. This made the vehicle unsafe to operate, especially while already on the road. Due to these repeated failures, I was required to tow the vehicle multiple times. These problems — electrical malfunction, coolant overheating during driving, fuel system errors, and a non-functional fuel door — occurred repeatedly even after prolonged service by the dealership. The combination of electrical faults, overheating risk, hybrid system malfunction, and fuel system failure presents a significant safety concern. I will provide additional documentation to support this report. I request that NHTSA review this case to determine whether an investigation is warranted, as these issues may indicate a broader defect affecting this model.
Oil leaks from timing chain cover due to defective bolt material, bolts loosen and break. This is a widespread known issue with Cayennes and macans.
Broken and loosened timing chain cover bolts resulting in leaking oil onto drive components, belts and tires/brakes. This recall was done for the macan and not the Cayenne. Ours was covered under factory extended warranty. That said, this is criminal. Porsche needs to be investigated, they refuse to recall their vehicles and we all know there are some manufaturing issues that are 100% the factory's fault. If the ntsb refuses to hold their feet to the fire this type of engineering will continue.