Fuel System complaints by model year
| Year | Complaints | Share of year's complaints | Typical mileage |
|---|---|---|---|
| 2025 | 1 | 20% | — |
| 2024 | 1 | 20% | — |
| 2021 | 1 | 5% | — |
| 2020 | 1 | 4% | — |
| 2018 | 2 | 15% | 5,000 miles |
| 2017 | 3 | 17% | 24,000 miles |
| 2016 | 5 | 13% | 19,000 miles |
| 2015 | 2 | 14% | 16,000 miles |
| 2014 | 7 | 13% | 40,000 miles |
| 2013 | 5 | 13% | 0 miles |
| 2012 | 1 | 4% | 18,000 miles |
| 2009 | 4 | 27% | 190,000 miles |
| 2008 | 4 | 15% | 119,000 miles |
| 2006 | 19 | 46% | 118,000 miles |
| 2005 | 16 | 50% | 113,000 miles |
| 2004 | 9 | 24% | 110,000 miles |
| 2003 | 1 | 50% | — |
Which parts fail
Components named in complaints (fuel pump, injectors, fuel tank, hybrid and EV propulsion).
Mileage when the problem started
What owners report
I am reporting a series of safety-related defects involving the electrical, cooling, and fuel systems of my 2021 Porsche Cayenne E-Hybrid. The vehicle was initially brought to the authorized Porsche dealership due to an electrical system error, and the dealer kept the vehicle for an extended period. After approximately five months, the vehicle was returned to me without a clear explanation of the root cause or details of the repair. The very next day after receiving the vehicle, a coolant temperature warning appeared while driving, indicating abnormal engine overheating. This created an immediate safety hazard, as overheating can lead to sudden engine failure, loss of power, or a potential fire risk. I returned the vehicle to the dealership again for further repairs. …
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. …
When slowing almost to a stop, and then need to accelerate, such as slowing for a yield sign, then trying to merge, vehicle is non responsive to throttle input for at least a second, or more. This has put me and others at risk because I assume I'm going to be able to accelerate when pull into traffic and am not able to. The dealer has had the vehicle but was unable to reproduce. It does not always do it, there's some combination of engine, drivetrain or fuel management it's in that does this. I have disabled start/stop mode. There are no system messages or OBD errors. The dealer has said that others have experienced this and the manufacturer has told them it's "normal". It's a safety problem and I'm seeking help in getting the manufacturer to fix it. Note, I sent the attached letter to manufacturer and did not receive a reply. …
car had a smell of gas diesel fumes inside cabin from air conditioning system. number of oil leaks over the years as well. now car at dealer for repair over 10 month. not fixed yet. number of problem with same diesel engine on line, even article i found . car was sold as CPO , it was new unregister, but they guaranteed us there will be no emission problems or leaking with this car. now warranty almost over Nov 2023 , and I will get a defective car back maybe... after warranty will expire! more importantly a car that leaks oil or diesel and smells inside the cabin from that.
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.
Porsche diesel emission compliant fix: - Porsche was required to apply emission fix to 2014 Cayenne diesel - diesel emission settlement requirement is the emission fix "..will not result in any noticeable changes to the driving characteristics.." - in jan 2018, emission fix was applied to 2014 Cayenne diesel - right after fix, the car showed 2-3 sec lag from the stop. At stop, when gas pedal is pressed, the car does not accelerate for 2-3 sec, then it "jumps" - in May, car was taken to Porsche dealership. Dealer stated that this lag is normal after fix, even though there was no such lag before fix - Porsche dealership installed latest software on the car in May. After that, lag decreased from 2-3sec to 2 sec. But the car still has abnormal lag - it feels unsafe to drive the car, when merging to roundabouts, when merging from the stop - a complaint was filed with Porsche cars of America. …
Engine light came on and vehicle decelerated while making a turn in traffic. Based on the owners manual and code test, it comes up as a DPF issue. We could have been seriously injured had the oncoming traffic been closer to us or had someone attempted to follow me on the turn. When the car lost power, I could not accelerate to complete my turn. The problem has been duplicated by my husband who has some mechanical expertise, but the next step would be to take it to a dealer. It is available for inspection, but it is not safe to drive. The check engine light and the glow plug lamp came on at the same time. It happened once before on the interstate coming across I-80 on the interstate. In the middle of nowhere with no cell phone service, we were able to pull over, shut off and restart the engine which cleared the code for the rest of the trip. …
This vehicle qualified for the Volkswagen Emissions Recall, yet from the start of the recall through 2018 settlement lawsuit dates , no correspondence was sent (by Porsche nor VW). According to all recall regulations, my vehicle should have among the 'recall' with the 85K plus others, yet no correspondence was sent (by Porsche nor VW) & now the local Porsche dealership is denying in, According to all recall regulations, even still with the EPA, the vehicle was to receive an initial emissions test, then undergo all related repairs/part replacements before the issue resulted in toxic emissions, NOX sensor failures, & premature problems with the DPF system, leading to thermostat problems & the failure of the diesel turbo. …
Related recalls (3)
Fuel system, gasoline › Delivery › Fuel pump
Porsche Cars North America, Inc. (Porsche) is recalling certain 2024-2026 Panamera, Cayenne, and 2025 Panamera E-Hybrid vehicles. The fasteners securing the high pressure fuel pump may not be tightened properly, resulting in a fuel leak.
Remedy: Dealers will inspect and tighten the screw connections and replace the high pressure fuel pump and fuel lines as necessary, free of charge. Owner notification letters were mailed November 19, 2025.
Fuel system, gasoline › Delivery › Fuel pump
Porsche Cars North America, Inc. (Porsche) is recalling certain 2003-2006 Cayenne S and Cayenne Turbo vehicles, 2004-2006 Cayenne vehicles, and 2006 Cayenne S "Titanium" Edition vehicles. These gasoline-powered vehicles have a fuel pump flange that may crack, allowing fuel to leak.
Remedy: Porsche will notify owners, and dealers will replace the fuel filter flanges with new filter flanges that have a protective film, free of charge. The recall began July 6, 2018.
Fuel system, gasoline › Delivery › Hoses, lines/piping, and fittings
Porsche is recalling 5,573 my 2008 cayenne v6 vehicles. A fuel line in the plenum panel area May contact the rear engine compartment cover. Relative movements of the engine while driving May cause knocking noises and chafing on the fuel line. A fuel leak May develop.
Remedy: Dealers will reroute the fuel line and install an additional spacer ring free of charge. The recall began on February 15, 2008. Owners May contact Porsche at 1-800-767-7243.
Frequently asked questions
Which Porsche Cayenne years have fuel system problems?
By NHTSA complaints, the 2006 (19), 2005 (16), 2004 (9), 2014 (7) and 2013 (5) model years. Fuel System complaints make up 46% of all complaints for the 2006.
Is there a recall for Porsche Cayenne fuel system problems?
Yes — 3 recalls, including 25V-634 (fuel pump, Sep 23, 2025); 17V-576 (fuel pump, Sep 20, 2017); 08V-076 (hoses, lines/piping, and fittings, Feb 20, 2008). Recall repairs are free at authorized dealers; check a specific car with the VIN recall check.
At what mileage do Porsche Cayenne fuel system problems start?
Across all years, half of the complaints with a recorded mileage happened before about 86,000 miles; 34% happened before 50,000 miles.
What part fails most often?
Owners most often name the delivery › fuel pump (3 mentions), followed by the delivery (1).
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.