2017 PORSCHE CAYENNE Fuelpropulsion System Problems

Case Number: 1170739 – Additional Evidence Submission I would like to provide an additional document for Case #1170739. The manufacturer (Porsche Cars North America) stated in writing that the vehicle is “safe to drive even with warning indicators illuminated,” but in the same communication offered a rental vehicle if I found this “inconvenient.” These two statements cannot logically coexist, and they raise concerns that the manufacturer may be minimizing or mischaracterizing a potential safety-related defect. Furthermore: The warning indicators involve the coolant and fuel systems of an E-Hybrid model, which may be connected to thermal management and combustion-related safety. The vehicle remained in the dealer’s possession for an extended period during repeated repair attempts. During a visit, I found the hood partially open while the vehicle was being stored long-term, raising questions regarding proper safety and storage protocols. Additional system warnings appeared after prolonged non-operation, suggesting possible deterioration related to...

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...

OVERNIGHT FUEL PRESSURE LOSS RESULTS IN EXTENDED CRANK CYCLE. DESPITE 6 SERVICE VISITS BETWEEN TWO CHICAGOLAND AREA PORSCHE DEALERSHIPS, THE VEHICLE HAS NOT BEEN SATISFACTORILY REPAIRED. FUEL PRESSURE LOSS WAS CONFIRMED ON MULTIPLE OCCASIONS BY THE SEMERSKY'S PORSCHE EXCHANGE IN HIGHLAND PARK, ILLINOIS. FUEL PUMPS WERE APPARENTLY REPLACED, THE LAST TIME DAMAGING THE SEAT CLIPS UNDER THE SECOND ROW BENCH SEAT. FUEL PRESSURE LOSS HAS SLOWED, BUT STILL OCCURS WHEN FUEL TANK IS MORE THAN 3/4 EMPTY. THIS VEHICLE IS COVERED BY MANUFACTURER WARRANTY AND THE PROBLEM BECAME APPARENT AT 24K MILES.