Most common 2018 Porsche Cayenne problems
Share of the 13 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Porsche Cayenne complaints by model year
Best Cayenne years: 2022. Years to avoid: 2019, 2014, 2020, 2016, 2021. Compare all years →
2018 Porsche Cayenne recalls (1)
Equipment
Porsche Cars North America, Inc. (Porsche) is recalling certain 2017 Porsche Cayenne Turbo S, Cayenne Turbo, Cayenne Plug-in Hybrid, Cayenne GTS, Cayenne Plug-in Hybrid Platinum Edition, Macan Turbo and Macan GTS vehicles, 2017-2018 Cayenne S, Macan, Cayenne Platinum Edition and Macan S vehicles and 2018 Cayenne vehicles…
Remedy: Porsche will notify owners, and dealers will replace the ski bags, free of charge. The recall began January 10, 2019. Owners may contact Porsche customer service at 1-800-767-7243.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2018 Porsche Cayenne:
Desiccated Air Bag Inflator Rupture
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited.
What 2018 Porsche Cayenne owners say
Engine & cooling
The day we took our Porsche home, we noticed a lot of heat generation in the car- but we thought it will be fine going further, given the attention to detail of Porsche's Automobile Engineering. The following days were not any better for my daughter- she missed a major accident because of the unexpected burnt smell and loud warnings of an overheat of the engine by Porsche in the middle of a highway. Due to her excellent driving record for the past 5 years, she was able to manage and stop in the middle of the highway at the curb of the road. She panicked so much so that, she stopped using the Porsche and borrowed our other cars, Benz and Lexus. I requested her to give Porsche another chance yesterday night. …
Intermittent lack of acceleration when taking left turns from a dead stop. Car was a dealer loaner with 9000 miles on speedometer. I purchased the car in August, 2018. Within the first 1000 miles and in less than four weeks I experienced a serious lack of acceleration on two occasions when making a left turn, I reported this to the dealer and was advised that it was probably driver error caused by operating the brake and accelerator using both feet. I do not drive an automatic car using two feet. Also, I was told by the dealer they checked with Porsche and there are records of this type of event. I checked on the internet and there are numerous identical complaints dating back several years. This lack of acceleration has occurred four more times. The dealer has been responsive and kept my vehicle on two occasions to try and duplicate the event to no avail. …
Electrical system
The high-voltage battery pack in my 2018 Porsche Cayenne S E-Hybrid (VIN: [redacted] , 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 #[redacted], 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. …
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.
2018 Porsche Cayenne engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.0L 6-cyl supercharged plug-in hybrid | 8-speed dual-clutch | AWD | 21 / 24 / 22 |
| 3.6L 6-cyl turbo | 8-speed automatic | AWD | 17 / 24 / 20 |
| 3.6L 6-cyl | 8-speed automatic | AWD | 18 / 24 / 20 |
| 4.8L 8-cyl turbo | 8-speed automatic | AWD | 14 / 21 / 17 |
EPA ratings. Class: SUV.
Frequently asked questions
Is the 2018 Porsche Cayenne a good car?
Based on 13 owner complaints filed with NHTSA, the 2018 Cayenne rates average: 1.3× as many complaints as a typical year of the Cayenne at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2018 Porsche Cayenne?
The engine & cooling — 3 complaints, 23% of all complaints for this model year. Next are the electrical system (3) and fuel & propulsion system (2).
How many recalls does the 2018 Porsche Cayenne have?
There is 1 recall for the 2018 Porsche Cayenne, the most recent from November 28, 2018 (equipment). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Porsche Cayenne?
The best years by complaints, compared at the same age, are 2022. Years to avoid or approach with caution: 2019, 2014, 2020, 2016 and 2021. See the full Porsche Cayenne years comparison.
At what mileage do 2018 Porsche Cayenne problems happen?
The median mileage reported in complaints is about 10,000 miles; 100% of problems with a recorded mileage started before 50,000 miles.
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.