2020 Porsche Cayenne

This engine EA839 is the same engine installed in Audi’s and which has a massive engine replacement going on now. It seems that the above engine has what is called piston slap or rocker arm failure which requires a complete engine replacement. The manufacturer knows of this problem and as of yet has not issued a recall leaving the customer with a 20,000 repair cost.

Nearly 25% of the total time I have owned this Certified Pre-Owned vehicle (146 out of 564 days), it has been non-functional and in the shop — roughly 1 out of every 4 days of ownership. I am a [XXX} with a [XXX] child, and I purchased this vehicle as a Certified Pre-Owned (CPO) Porsche — expecting the manufacturer's rigorous inspection and warranty to ensure reliability and safety. Instead, the first breakdown occurred within just 1 month of purchase, and the vehicle has since failed six separate times over 18 months (Feb 2025–Aug 2026), totaling 60+ days out of service, despite extensive component replacement: [XXX] (≈1 month after CPO purchase) – Battery failure; car would not start; towed at 2–3 AM. [XXX] – No-start; fuel tank drained/refueled ("improper additive"). [XXX] – Low fuel pump replaced. [XXX] – High fuel pump, all 6 fuel injectors, DME system replaced. [XXX] – Recurring no-start; repurchase denied May 7, 2025; Porsche later claimed root cause found (mechanical part) and replaced it. Aug 1, 2026–ongoing – Check engine light returned; misfire on cylinder 4 and coolant leak into vacuum system found. Dealer replaced coolant pump/vacuum components, updated DME software — check engine light reappeared on the dealer's own test drive. Why This Is Especially Dangerous: A CPO vehicle should not fail this quickly or repeatedly. It raised serious concern that either the inspection was inadequate or a pre-existing defect was never disclosed. My child rides in this vehicle regularly. A sudden stall or power loss at highway speed, at an intersection, or during school pickup/drop-off could cause a serious collision, endangering my child's life and my own. As a [XXX] with no backup driver/vehicle, an unexpected breakdown have cost lost work time, unreimbursed Uber expenses, and childcare disruptions. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2020 Porsche Cayenne. The contact received notification of NHTSA Campaign Number: 25V896000 (Back Over Prevention). The contact stated that the rear-view camera became inoperable while reversing and then turned on. There were no warning lights illuminated. The contact was unable to trade the vehicle due to the open recall. The local dealer was contacted and confirmed that the software update was not available. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 80,000.

Porsche dashboard leather shrunk and is bubbling on the entire top where the Airbag sits. I was told that if the vehicle was in an accident the airbag might not deploy correctly. The Porsche dealer looked at it and recommended replacing the entire dashboard! This is a very common issue with Porsche, and a safety concern which seems due to the fact that Porsche did not use the correct adhesive on all most of cars build in the last 10 years. The dashboard is not withstanding normal sun light and this causes a safety issue.

My 2020 Porsche Cayenne has experienced leather dashboard delamination, with the leather separating, shrinking, and lifting from the dashboard substrate on both the driver and passenger sides. The delamination extends across the upper dashboard, including areas adjacent to the passenger airbag deployment zone. I am concerned that loose or detached dashboard material could interfere with, delay, or alter the proper deployment of the passenger airbag during a collision, increasing the risk of injury. The continued deterioration also raises concerns about the integrity of the dashboard structure over time. Porsche inspected the vehicle and determined that the repair requires replacement of the entire dashboard assembly at an estimated cost of approximately $8,000 to $10,000. This indicates the condition is not a cosmetic issue but requires replacement of a major dashboard component. I have identified numerous reports from other Porsche owners describing the same leather dashboard delamination on late model Cayenne vehicles, suggesting this is a recurring manufacturing defect rather than an isolated occurrence. Porsche is part of the Volkswagen Group. Audi, another Volkswagen Group brand, issued Technical Service Bulletin 2071698/1 (NHTSA TSB MC-10245529-0001) addressing leather dashboard delamination caused by adhesive failure. The bulletin describes bubbling, wrinkling, loose leather, and delamination and instructs dealers to replace the dashboard. Audi also issued a limited warranty extension for affected vehicles. While Audi's bulletin does not apply to Porsche vehicles, it demonstrates that Volkswagen Group has recognized this type of dashboard adhesive failure. I request that NHTSA investigate whether Porsche Cayenne dashboard delamination constitutes a safety defect with the potential to affect passenger airbag deployment and occupant protection.

The contact owns a 2022 Porsche Cayenne. The contact stated that an abnormal tapping noise was coming from the engine compartment. No warning lights were illuminated at the time of the failure. The vehicle was initially taken to an independent mechanic, who confirmed the tapping noise and referred the contact to an authorized dealer for further inspection. The vehicle was then taken to local dealers, who acknowledged the noise but advised that the vehicle was operating as designed and that the condition was considered normal. The vehicle was not diagnosed or repaired. The vehicle was later taken to New Country Porsche Greenwich Service Center, 241 West Putnam Avenue, Greenwich, CT 06830, but the vehicle was not diagnosed or repaired. The tapping noise continued to persist over time. The manufacturer was contacted and confirmed that there was no warranty coverage. The failure mileage was approximately 40,000.

Seat belt and airbag indication lights and sound alarms remain on and notifying on the dashboard regardless of buckling. It will intermittently stop and start as the car is in motion. In the beginning, notification was present then resolved day-to-day. More recently, the alarm is present every drive. Driver was unsure whether or not the notifications were valid or not as the pattern of notification had little consistency. Dealership service later admitted that it was a faulty seat belt buckle and that part had failed internally, but refused to remedy it unless paid for. Car is essentially inoperable and unsafe until faulty buckle is replaced, as a faulty seat belt buckle can be fatal, with faulty implying a manufacturing issue and not of user misuse or abuse of systems. Manufacturer will not provide warranty and dealership continues to demand vehicle owner to pay.

The contact owns a 2020 Porsche Cayenne. The contact stated that the front driver’s side seat belt failed to buckle and became unusable. The dealer and the manufacturer were notified of the failure. The contact was advised to schedule an appointment for the vehicle to be repaired at the owner's expense. The vehicle was not diagnosed or repaired. The contact related the failure to an unknown recall. The failure mileage was approximately 68,000.

Vehicle: 2020 Porsche Cayenne VIN: [XXX] Mileage: 41,918 Complaint: My 2020 Porsche Cayenne exhibits a significant and repeatable lurching and abnormal braking pattern each time the vehicle decelerates to a stop. The behavior is consistent and pronounced enough to cause me physical motion sickness on every drive. I brought the vehicle to Porsche Bellevue (Bellevue, WA) for diagnosis. The service manager personally rode in the vehicle with me, experienced the lurching behavior firsthand, and acknowledged feeling it. He then stated the vehicle could not be repaired because this is simply how the car behaves — no repair order was written and no fix was attempted. I am filing this complaint because: (1) the behavior involves abnormal braking and deceleration which I believe constitutes a safety concern, (2) the authorized dealership confirmed the issue exists but refused to document or repair it, and (3) I am concerned other owners of this vehicle may be experiencing the same issue without recourse. I am requesting NHTSA investigate whether this is a known issue across the 2020 Porsche Cayenne platform and whether it meets the threshold for a safety investigation or recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)