Other Fuel System Related Problems of the 2020 Porsche Cayenne

Other Fuel System problem

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).