185 problems have been reported for the 2009 Jeep Grand Cherokee. The following chart shows the 20 most common problems for 2009 Jeep Grand Cherokee. The number one most common problem is related to the vehicle's electrical system with 45 problems. The second most common problem is related to the vehicle's engine and engine cooling (24 problems).
In our research we use the PPMY index to compare the reliability of vehicles. The PPMY index of a certain model is defined as the problems reported per thousand vehicles per Year. The total sales of the 2009 Jeep Grand Cherokee in the United States are 7,089 units [1]. If the total number of problems reported by Jeep Grand Cherokee owners in the last 16 years is 185, and the age of the vehicle is 16, the PPMY index can then be calculated as
PPMY Index = 185 / 7,089 / 16 * 1000 = 1.63.
For more information, refer to this page: A study of reliability comparison across Jeep Grand Cherokee model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2009 Jeep Grand Cherokee in 2009.
| Service Year | Number of Problems |
|---|---|
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 |
When making the decision between buying a new or used Jeep Grand Cherokee, the following table can be used to compare the 2009 Jeep Grand Cherokee with the Jeep Grand Cherokee from other model years. Note that the number of problems reported for the 2009 Grand Cherokee is 185 while the average number of problems reported for the 30 model years of the Jeep Grand Cherokee is 1,190.