79 of the
702 complaints filed about the Porsche Cayenne
are about the electrical system —
11% of everything owners reported.
The worst model year for it is 2019.
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)
NHTSA complaint #11756293 — an unverified report by a vehicle owner.
Battery completely discharged and the safety switch in the battery malfunctions and battery can not be charged again. There are many complaints seen online about the battery problems Porsche has. This strands the car and me the driver. The dealer and independent mechanics said the same. There were no warning lamps or messages prior to the failure.
NHTSA complaint #11755286 — an unverified report by a vehicle owner.
The contact owns a 2017 Porsche Cayenne. The contact stated that the vehicle was hacked. The contact stated that while driving at an undisclosed speed, the driver's assistance safety features malfunctioned, causing the vehicle to swerve despite the driver's efforts to drive straight. Infotainment settings confirmed that the Porsche Doppelkupplung (PDK) system was engaged. Additionally, the message "External Usage External Equipment External Drivers remove the features" was displayed, and the cruise control was 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.
NHTSA complaint #11753055 — an unverified report by a vehicle owner.
Odometer Fraud. The contact purchased a 2012 Porsche Cayenne. It was discovered that there was a mileage discrepancy. The vehicle was a private sale from Facebook Market Place. At the time of purchase, the vehicle mileage was 125,383, but after performing an AutoCheck of the vehicle, it was discovered that the mileage was 205,154.
NHTSA complaint #11748836 — an unverified report by a vehicle owner.
The hybrid cooling system on my 2019 Porsche Cayenne E-Hybrid repeatedly displayed a red dashboard warning while the vehicle was in motion: "Hybrid coolant level too low / Park vehicle safely / Let vehicle cool down." This warning appeared on multiple occasions at speeds of approximately 22 mph, 38–40 mph, and 47 mph, as documented in timestamped photos and videos taken in November 2025. A separate warning in July 2025 read: "Engine cannot be started / Remove charger plug." The warnings indicate a potential thermal management or hybrid cooling system failure. A moving vehicle being instructed to park and cool down presents a safety risk to the driver and others, particularly if the condition causes sudden power loss or thermal event. The vehicle was serviced at an authorized Porsche dealer in 2025. Despite that service activity, the hybrid coolant warning recurred while driving in November 2025, suggesting the underlying condition was not fully resolved. The issue was reported to the manufacturer (PCNA), who acknowledged it under a case number and offered a service voucher. The selling dealer attributed the concerns to a manufacturer charging-cable campaign. Neither response addressed the recurring in-motion warning or confirmed the hybrid cooling system was repaired. Timestamped photo and video evidence is available showing the dashboard warnings and vehicle speed at time of occurrence. Complete repair orders have been requested but not yet provided. The component may be available for inspection upon request.
NHTSA complaint #11745533 — an unverified report by a vehicle owner.
The emergency braking system light and the adaptive control cruise control is not working in the warning. Lights are on from Dave that I’ve got it from day one January 2026.
NHTSA complaint #11745194 — an unverified report by a vehicle owner.
Odometer Fraud. The contact purchased a 2009 Porsche Cayenne. The vehicle was a dealer sale. The contact stated that upon taking the vehicle to O’Reilly's for a diagnostic test, the diagnostic report listed the mileage at 209,000; however, at the time of purchase, the vehicle mileage was 105,000. The dealer was not notified of the discrepancy, as per the Attorney's advice.
NHTSA complaint #11744537 — an unverified report by a vehicle owner.
Instrument cluster anti-glare film or delamination on center and left instrument cluster. The film is wearing away in certain irregular sport and shapes. The overall wear is impacting the visibility to the center cluster under certain conditions leading to obscure visibility to important information, including vehicle speed or other warning light. It has been raised to the dealer, then to Porsche NA, but the dealer has stated they (Porsche NA) will not cover the repair, even though the vehicle is under a CPO warranty. This first started appearing this year and has gotten worse over time. No unusual cleaning, harsh chemicals or other abrasive object were used. The nature of film is slick issue is inconsistent with this and does not appear on other parts of the user interface - just the more important ones. Porsche NA initially blamed the dealership, and then later denied my claim and now escalating.
NHTSA complaint #11737123 — an unverified report by a vehicle owner.
The high-voltage battery pack in my 2018 Porsche Cayenne S E-Hybrid (VIN: [XXX] , approximately 81,000 miles) has experienced a noticeable and progressive reduction in battery range and performance. On February 20, 2026, Porsche White Plains (an authorized Porsche dealer) performed an inspection but was unable to duplicate an active fault code and declined to generate a battery State of Health (SoH%) report. No warranty repair was authorized. Porsche Cars North America (PCNA), Case #XXX, has since moved to close my statutory warranty claim, citing the absence of a duplicated fault. However, under New York State's adopted CARB emission warranty standards (6 NYCRR § 218-9.1), high-voltage propulsion batteries in TZEV/PZEV vehicles are warranted for 10 years or 150,000 miles from the date of original sale. My vehicle was placed in service in 2018 and remains within that statutory coverage window through 2028. PCNA has not addressed this statutory obligation or provided written confirmation of coverage. I also have not received the inspection documentation I formally requested on March 17, 2026, despite no case closure having occurred at the time of that request. As of the date of this filing, PCNA has not responded to my follow-up correspondence. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11735314 — an unverified report by a vehicle owner.
My 2025 Porsche Cayenne S was involved in a low-speed crash and experienced multiple safety failures related to the Driver Assistance Control Unit, including phantom braking and camera failure. This crash, I believe, is a direct result of the safety defect identified in Recall ASB2 (NHTSA 25V896), which causes the Driver Assistance Control Unit to fail to process image and sensor data correctly. My vehicle has exhibited a dangerous pattern of electronic and sensor instability that aligns perfectly with the technical failures described in the recall: The Collision: While reversing in a parking garage on November 25, 2025, I struck a wall because the rearview camera and parking sensors failed to provide any notification or visual feed. I now understand this was caused by the "transient signal noise" cited in the recall, which prevents the system from detecting obstacles in specific lighting environments. Phantom Braking: On two separate occasions, the vehicle abruptly "slammed" on the brakes for no apparent reason, nearly causing high-speed rear-end collisions. When reported to The Collection Porsche Service on January 23, 2026, the Service Manager admitted the system is hypersensitive to shadows. This confirms the control unit is failing to correctly interpret image data—the exact root cause of the current recall. Total Electrical Failure: On December 2, 2025, the vehicle suffered a defective alternator, causing a total shutdown in a live intersection. This resulted in a seven-week repair (completed Jan 23, 2026). Unstable voltage from a failing alternator is a primary source of the "signal noise" that causes the driver assistance systems to malfunction. I initially believed the bumper contact was a personal error. However, given the documented failure of the alternator and the subsequent recall regarding camera/sensor data processing, it is clear that the vehicle’s safety systems were compromised at the time of the incident. Porsche NA has been notified.
NHTSA complaint #11729786 — an unverified report by a vehicle owner.
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. Federal regs mandate that vehicle & vehicle equipment manufacturers comply with Early Warning Reporting requirements, submit to NHTSA copies of their manufacturer communications. & update all communications including warranty, policy extensions & product improvement communication sent to dealers, distributors, owners, purchasers, etc. regarding any defect, failure or malfunction beyond normal deterioration in use, failure of performance, flaw or other unintended deviation from design specifications whether it is safety-related or not. Porsche now says my vehicle never showed the recall, despite court mandates that all affected vehicles will be notified communication failed on the sides of both manufacturers. In 2026, if one possesses an eligible vehicle but never received a "Dieselgate" recall notice, options for financial compensation from the original U.S. settlements stated to be likely limited, & I’m not able to find how to proceed with Volkswagen, but regardless, according to EPA and all vehicle standards, I read my vehicle is still entitled to receive an emissions modification at no cost, and that I should be covered by an extended emissions warranty to address all current & related issues.
NHTSA complaint #11724527 — an unverified report by a vehicle owner.
The contact owns a 2022 Porsche Cayenne. The contact stated that the message that the mileage could not be recorded was intermittently displayed while driving. Additionally, the contact stated that the rearview camera was intermittently inoperable after shifting to reverse(R). The vehicle was taken to the dealer, and the cameras were replaced; however, the failure recurred approximately 5 months later. The vehicle was taken back to the dealer, where the contact was informed that the vehicle could not be repaired because the failure could not be duplicated. The contact had received notification of NHTSA Campaign Number: 25V896000 (Back Over Prevention), which the contact associated with the failure. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was approximately 8,000.
NHTSA complaint #11721661 — an unverified report by a vehicle owner.
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. During a visit, I found the hood partially open while the vehicle was being stored long-term, raising questions regarding proper safety and storage protocols. Additional system warnings appeared after prolonged non-operation, suggesting possible deterioration related to improper storage or incomplete diagnostics. I respectfully request NHTSA’s assessment of whether it is appropriate for a dealer or the manufacturer (Porsche Cars North America) to advise a customer to operate a vehicle on public roads while warning indicators are illuminated. From a consumer’s standpoint, this does not appear reasonable or safe, and I wish to operate my vehicle only in a condition that is objectively safe for road use. The fact that such guidance was provided to me is deeply concerning, and I would appreciate the agency’s evaluation of whether this type of advice aligns with I am submitting the manufacturer’s email for your review, as it appears inconsistent with standard safety guidance and may reflect an attempt to address the matter through customer-service accommodations rather than technical evaluation. Please add this information and attached documentation to my existing case file. Thank you.
NHTSA complaint #11704535 — an unverified report by a vehicle owner.
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. Afterward, another serious issue occurred: because this is a hybrid vehicle, I went to refuel, but the fuel door would not open, and a fuel system error warning appeared again. This made the vehicle unsafe to operate, especially while already on the road. Due to these repeated failures, I was required to tow the vehicle multiple times. These problems — electrical malfunction, coolant overheating during driving, fuel system errors, and a non-functional fuel door — occurred repeatedly even after prolonged service by the dealership. The combination of electrical faults, overheating risk, hybrid system malfunction, and fuel system failure presents a significant safety concern. I will provide additional documentation to support this report. I request that NHTSA review this case to determine whether an investigation is warranted, as these issues may indicate a broader defect affecting this model.
NHTSA complaint #11703739 — an unverified report by a vehicle owner.
The rotary volume control knob on the center console of my 2024 Porsche Cayenne Coupe detached during normal, routine interior cleaning while the vehicle was stationary. The knob lifted off the control shaft with minimal contact from a standard handheld vacuum nozzle. This indicates that the retention mechanism of the control knob is insufficient and may represent a manufacturing or design defect. A loose or detachable interior control is a safety concern because it distracts the driver from the road when attempting to adjust audio, alerts, or climate menu functions. The control knob is part of an interface that the driver must use while driving, and if it unexpectedly detaches or becomes loose, it can impair the ability to safely manage vehicle settings. The issue was reported to the Porsche dealership and Porsche Cars North America. Both declined warranty coverage and classified the problem as “customer damage,” despite the failure occurring under normal usage conditions and without misuse. A properly secured interior control knob should not detach during light interior cleaning, and this may indicate a broader quality-control issue affecting similar vehicles. There were no warning lights prior to the failure. The problem is reproducible because the knob no longer attaches securely to the shaft. I am reporting this to NHTSA because an interior control that detaches under normal use may distract drivers, impair safe operation of infotainment and climate systems, and may indicate a defect in the design or construction of the control assembly.
NHTSA complaint #11702293 — an unverified report by a vehicle owner.
Odometer Fraud. The contact purchased a 2021 Porsche Cayenne. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase on 5/29/25, the mileage was 21,000. The contact had taken the vehicle to another dealer for other repairs, and the dealer informed the contact that the vehicle was flagged for Odometer Fraud, and the actual mileage was 90,000. The dealer found an odometer tampering device still located on the vehicle, but deactivated the device. The contact called the State Attorney General's Office for New Jersey.
NHTSA complaint #11692345 — an unverified report by a vehicle owner.
i was driving my car and at a stop sign i started accelerating when the light turned green - i must have been going 45 mPH after the light and all of a sudden my car went into hyper acceleration speeding up to 80 mph, i was pumping my brakes and the car was still raging to accelerate. I almost ran into a semi truck in front of me becuase i could not stop my car from accelerating, my foot was on the brake padel not the accelerator and it would slow down but as soon as I take the foot off of the brake - it would go into a rage accelration again, my car also gave WBA restricted warnings while accelerating. I was finally about 2 miles of stoping and accelerating pull into a sholder with my brakes slammed, and parking brake pulled, the car finally came to a stop. I was also being followed by other cars and could have caused them to run into me as i tried to stop the car.
NHTSA complaint #11687005 — an unverified report by a vehicle owner.
When the weather drops below 0 celsius, the hybrid battery fails with a hybrid battery failure message. The Porsche dealer said this is a known issue and there is no fix. I've been stuck several times in the past 3 years up in the mountains when the temperature drops suddenly and there are no services within 100's of miles to even tow it to get a fix. I just have to wait for the temperature to warm up to start the car. There is currently no bypass to switch to gas only which would solve the issue. If you look at the pic, there is plenty of gas in the car.
NHTSA complaint #11636091 — an unverified report by a vehicle owner.
In-car entertainment, transmissions controls, audio controls, climate controls (front and rear) , car will shut off without turning the key in off position, often times the vehicle will just terminate a call with no warning - no explantion, the rear camera on the screen in reverse show the rear of the car but it stays on for like 10 seconds when moving forward in drive, all of these are selected one the center console but placing your hand and fingers on the panel you accidentally select features or controls - this is dangerous because you hit things that you don't want and is distracting. the entertainment system does not have the features they represent that they do and you are constantly distracted with trying to find a feature that it doesn't have or can't find; using the phone will not allow you to use the keypad until stopped. so what you end up doing is using your iPhone which becomes a safety issue. there are so many problems that I can't message all. If you can give me a link I can't send or upload about 50 videos. I think all around to use the center counsel because hazardous design as to how to use a feature - it's a massive safety issue and hazard. I believe that many owners have been in accidents and caused damages and perhaps deaths. Porsche will not respond after the first call a few months ago. I was told by a dealer to contact the BBB - they told me that Porsche cars of America has a D minus rating and never has responded to customer complaints. I did discover that they made massive changes in the 2024 model. no wonder - I will stop here - will; attach a few photo's but there is no explanation. please help!!
NHTSA complaint #11634723 — an unverified report by a vehicle owner.
While the vehicle was charging, the protective sheath near the power outlet of the charging cable had possible electrical or fire damage. No warning lights were illuminated. Upon turning off the power and unplugging the outlet, it was determined that the plastic near the plug melted and caused the power to short. I have been unsuccessful getting the manufacturer to resolve the issue. A recall under APB6 was issued but did not include model year 2018 which uses the same cable that is impacted with the recall.
NHTSA complaint #11593998 — an unverified report by a vehicle owner.