146 problems have been reported for the 2009 Subaru Impreza. The following chart shows the 18 most common problems for 2009 Subaru Impreza. The number one most common problem is related to the vehicle's power train with 28 problems. The second most common problem is related to the vehicle's structure (22 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 Subaru Impreza in the United States are 42,533 units [1]. If the total number of problems reported by Subaru Impreza owners in the last 17 years is 146, and the age of the vehicle is 17, the PPMY index can then be calculated as
PPMY Index = 146 / 42,533 / 17 * 1000 = 0.20.
For more information, refer to this page: A study of reliability comparison across Subaru Impreza model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2009 Subaru Impreza in 2009.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 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 Subaru Impreza, the following table can be used to compare the 2009 Subaru Impreza with the Subaru Impreza from other model years. Note that the number of problems reported for the 2009 Impreza is 146 while the average number of problems reported for the 31 model years of the Subaru Impreza is 105.