Porsche Cayenne Problems by year

Diagnostics: Certified dealer diagnostics confirmed active high-voltage fault codes stored in the High-Voltage Battery Control Unit: P33F100 (High-voltage battery control unit, high-voltage system deactivation via CAN bus) and P0D3400. Upon replacing the control unit, the vehicle immediately threw fault code P0B1300 (High-voltage E-box, current measurement delta between Hall and shunt above limit value). The manufacturer is currently refusing to repair the interconnected E-box housing the high-voltage current sensors despite the component causing identical safety-critical vehicle shutdowns.

Safety risk: Several times in grocery store parking lots, I could not see pedestrians walking behind the vehicle while backing up. In my residential parking lot, with the cameras black, a vehicle I could not see nearly struck me. The parking sensors also failed to alert me. Dealer confirmation: Four dealer visits for this defect: 08/20/2026, 09/08/2026, 09/30/2026, and 10/14/2026. The dealer reproduced the failure, found fault codes for all four cameras, replaced the front camera, and reworked the passenger door camera wiring harness under Porsche technical instruction TI 9709. The failure continued after repairs. The case was escalated to Porsche field technical staff. The vehicle has been out of service more than 30 days and remains at the dealer unrepaired. Loaner vehicle: A new 2026 Cayenne provided as a loaner had the same failure, with the backup cameras going black. Service technicians and service staff stated multiple times that they are seeing this failure on most new Cayennes at the dealership. The screen goes black without warning. The vehicle is available for inspection at the dealership. Photos and video of the failures are available.

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. There was a burning odor coming from the front of the vehicle on the driver side. The manufacturer was notified of the failure. The failure mileage was 66,000.

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 was not visible when the vehicle was inspected. The water/condensation continued to recur, and I have dated photographs documenting the condition over time. On September 7, 2026, the vehicle displayed the warning "Check front right dipped headlight." I photographed the warning. The right front headlight has now completely failed and does not illuminate at all. The vehicle and failed headlight are available for inspection. I have reported the matter to Porsche Cars North America and provided repair records, dated photographs and contemporaneous communications. Porsche confirmed receipt of the documentation, but the problem remains unresolved. I am concerned that recurring moisture intrusion into the headlight assembly has progressed to complete lighting failure and may represent a safety issue

unintentionally engaged with messages for "Trailer," "Slippery Changing Max Settings," "Navigation Off," "Road feature Off," "Risk of an Accident," and "Pull Over, remove the key from the ignition and reset vehicle". The contact stated that while driving, the vehicle unintentionally shifted into Drive and Neutral at the same time. The contact stated that on several occasions, the vehicle failed to stop while depressing the brake pedal, requiring the driver to pull over to the side of the road and allow the vehicle to roll to a stop. Other failures included unintended engagement of the windshield wipers and heater. Per the owner's manual, the contact opened the infotainment settings, where the notification "Other Device External Usage" was displayed. Additionally, all four tire sensors needed to be replaced. The vehicle was taken to the dealer, and the insurance company, the Police Department, and the manufacturer were contacted, but no assistance was provided. The contact stated that all four tires blew up while driving, and the vehicle was towed to Porsche Charlotte Northlake (10205 Ronald Withrow Blvd, Charlotte, NC 28216); where the tires were replaced. The vehicle was not further repaired. The tire information was unavailable. The failure mileage was approximately 40,000.