2017 Porsche CayenneRecalls, problems, MPG & safety

“The contact owns a 2017 Porsche Cayenne. The contact stated the vehicle experiencing a catastrophic powertrain and electrical failure. The vehicle experienced severe thermal overloading behind the dashboard, and the radio head unit was excessively hot causing chrome trim around the screen to melt. The CAN bus was corrupted, causing the instrument cluster to display inaccurate information including 30 PSI and information that there were wheels on the vehicle. Additionally, the PCM malfunctioned and ceased Bluetooth connectivity and displayed system status logs indicating up to 7 drivers. The failure spread to the critical driving and safety systems. The contact stated while driving, the vehicle shifted to neutral unexpectedly. While inserting or removing the key from the ignition cylinder, the vehicle violently jolted back and forth. Most critically, the electrical cross-firing had compromised the automated driver assist features. The contact stated that without warning, the steering wheel violently jerked, and the vehicle drove off the roadway. The GPS became inoperable. The contact disconnected and removed the telematics module; however, the failure persisted.…”

“The RIGHT FRONT HEADLIGHT has experienced recurring water/moisture intrusion and has now completely failed and no longer illuminates. This creates a safety concern because the vehicle has substantially reduced forward illumination for nighttime driving. On September 23, 2024, an authorized Porsche dealer performed headlight-related warranty work. The dealer’s repair record states that both headlights were removed and the modules were swapped side-to-side during diagnosis. On September 30, only seven days later, I photographed substantial condensation/water inside the right front headlight. On October 1, 2024, I reported the continuing condition to my Porsche service advisor. In written communications, the advisor asked whether the affected light was the right side. I confirmed that it was. He stated that the condition was “not normal” and that he would order the headlight. He subsequently confirmed in writing that the right headlight had been ordered. I continued reporting the problem. A November 27, 2024 dealer repair order specifically documents: “CUSTOMER STATES-RIGHT HEADLIGHT IS HOLDING WATER.” The headlight was not replaced because the moisture reportedly…”

“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 improper storage or incomplete diagnostics. I respectfully request NHTSA’s assessment of whether it is appropriate…”