149 problems have been reported for the 2009 Toyota Yaris. The following chart shows the 21 most common problems for 2009 Toyota Yaris. The number one most common problem is related to the vehicle's air bags with 50 problems. The second most common problem is related to the vehicle's vehicle speed control (13 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 Toyota Yaris in the United States are 72,830 units [1]. If the total number of problems reported by Toyota Yaris owners in the last 16 years is 149, and the age of the vehicle is 16, the PPMY index can then be calculated as
PPMY Index = 149 / 72,830 / 16 * 1000 = 0.13.
For more information, refer to this page: A study of reliability comparison across Toyota Yaris model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2009 Toyota Yaris 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 Toyota Yaris, the following table can be used to compare the 2009 Toyota Yaris with the Toyota Yaris from other model years. Note that the number of problems reported for the 2009 Yaris is 149 while the average number of problems reported for the 15 model years of the Toyota Yaris is 78.
| Model Year | Number of Problems |
|---|---|
| 2020 Yaris | |
| 2019 Yaris | |
| 2018 Yaris | |
| 2017 Yaris | |
| 2016 Yaris | |
| 2015 Yaris | |
| 2014 Yaris | |
| 2013 Yaris | |
| 2012 Yaris | |
| 2011 Yaris | |
| 2010 Yaris | |
| 2009 Yaris | |
| 2008 Yaris | |
| 2007 Yaris | |
| 2006 Yaris |