Porsche Cayenne stalling problems

Filed Aug 11, 2026 · Electrical, Engine · TX

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)

Filed May 19, 2024 · Fuel system · CA

Catastrophic failure of Bosch CP4 high-pressure fuel pump in my 2014 Porsche Diesel Cayenne. Resulted in metal shavings/shrapnel throughout entire fuel system. Car abruptly stalled while pulling out of parking lot and was unable to restart. Had vehicle towed to nearest Porsche dealer for repairs. Quote for parts only (without labor) to repair vehicle is $29,440.47. With labor is in excess of $40,000. Car has been determined to be a total loss. My 2014 Porsche Diesel Cayenne has always been maintained at suggested intervals and all service work for the life of the car was performed by Porsche. It has been a wonderful, reliable and fun vehicle to drive prior to this horrible event. No warnings of fuel pump failure came up on vehicle warning and message system.

Filed Apr 20, 2023 · Transmission · 42,000 miles · GA

The contact owns a 2017 Porsche Cayenne. The contact stated while driving approximately 30 MPH, the vehicle stalled in the middle of a road. The contact stated no warning light was illuminated; however, the contact had been hearing an abnormal rattle and knocking sound from under the floorboard. The contact had the vehicle towed to a local dealer, where it was diagnosed and determined that the bolts from the transfer case had loosened, and the case had separated from the drive shaft. The vehicle had been repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 42,000.

Filed Feb 3, 2021 · Acceleration, Transmission · 12,000 miles · LA

Tl* the contact owns a 2014 porsche cayenne. The contact stated that while driving at various speeds, a rattling noise occurred before the vehicle loss power and stalled. During the failure, the check engine warning light had illuminated. The vehicle was taken to the local dealer porsche of new orleans located at 3700 n causeway blvd, metairie, la 70002 who replaced the transmission transfer gear. Approximately 20,000 miles later the failure recurred and the contact was informed that the transfer gear was faulty and needed to be replaced a second time. In addition, the speed sensors in all four wheels were faulty causing the vehicle to randomly slow down and not accelerate. The sensors were replaced and the failure was remedied. The manufacturer was notified of the failures but no assistance was offered. The failure mileage was 12,000.

Filed Dec 20, 2020 · Fuel system · 119,000 miles · CA

Engine has cutoff on 3 occurrences: (1) operating the vehicle on the freeway at 70 MPH and experienced immediate loss of power. I was able to manuever the vehicle to the shoulder while coasting without engine power. I was able to start the engine but it cutoff a few seconds after. The vehicle had to be towed to an independent porsche repair shop where the high pressure fuel pump was replaced. (2) the engine cutoff while operating on city street at 40 MPH. I was able to manuever the vehicle while coasting without power or power steering into a parking lot. The engine would start but cutoff a few seconds later on multiple attempts. The vehicle has to be towed to the same independent porsche repair shop where the high pressure fuel sensor was replaced. This occurrence was the first time operating the vehicle after returning home from the high pressure fuel pump replacement service. (3) operating the vehicle while stopped at an intersection at a red light. When attempting to accelerate the engine cutoff and I was stalled for about 1 minute blocking traffic. I was able to restart the engine after a few attempts and drive the vehicle the remaining 2 miles home without incident. All 3 occurences involved abrupt engine cutoff and loss of power steering. The porsche independent repair shop is unable to pinpoint the issue. The risk exposure to accident is high when engine cutoff occurs while the vehicle is in motion.

Filed Nov 13, 2019 · Engine · 22,000 miles · NJ

The car lost power and stalled on the highway without warning, the road was the garden stat parkway in new jersey , happened in mid night

Filed Feb 1, 2019 · Electrical, Fuel system · 39,563 miles · CA

While driving on the city street for about 10 minutes when a message "fault-fuel gauge" popped up on my instrument cluster. Tried to fill the tank at the gas station but then the tank was full however the fuel gauge incorrectly indicating the tank is only 1/2 full.message would intermittently come on while driving. This vehicle was manufactured in june 2014 not recalled nor corrected by porsche manufacturer in their recall of 2014 model. Car mileage is only 39,563 and this cars VIN was not included on porsche recalls. This particular fault is exactly the same fault as all the 2014 cayenne porsche has previously recalled.carfax report on this model/VIN states no recall. It would be dangerous to take this vehicle for a long drive due to inaccuracy in fuel gauge reading as vehicle can dangerously run out of fuel and stalling and increasing risk of accident.

Filed Jun 28, 2018 · Fuel system · 116,000 miles · FL

Tl* the contact owns a 2006 porsche cayenne. While at a stop light or when making a left or right turn, the vehicle intermittently stalled. The vehicle was not taken to the dealer for diagnostic testing. The contact received notification of the federal safety agency campaign number: 17v576000 (fuel system, gasoline); however, the part needed for the repair was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The contact called the collection dealer at (305) 444-5555 (located at 200 bird rd, coral gables, fl 33146) and was informed that the part was not available. The manufacturer was not made aware of the failure. The approximate failure mileage was 116,000. Parts distribution disconnect.

Filed Jun 5, 2018 · Transmission · 54,000 miles · MA

Transfer case failure. Causes intermittent rough stuttering when depressing gas pedal on highway especially on incline. Car dealer did not detect problem when performing diagnostics. Went to another dealer service location. Service representative drove the car and quickly confirmed the cause is a transfer case failure. We were told our car can stall at anytime which is a clear safety hazard. After a lot of research, we found out transfer case failure is a consistent and recurring issue for porsche cayenne's manufactured in 2011 to 2017.

Filed Jul 28, 2017 · Engine · 94,000 miles · CA

The bolts on the camshaft controller broke inside of my engine. When this happened, I was driving southbound on the 405 freeway in los angeles, ca. The car violently jerked and then stalled on the freeway. This almost caused a major accident, but thankfully everyone was able to avoid my car. I've been told by a few repair shops that the damage done by the loose bolts likely damaged the engines internal components and I will likely be needing a new engine or an overhaul of the existing engine.