203 problems have been reported for the 2009 Ford Mustang. The following chart shows the 19 most common problems for 2009 Ford Mustang. The number one most common problem is related to the vehicle's air bags with 135 problems. The second most common problem is related to the vehicle's vehicle speed control (17 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 Ford Mustang in the United States are 42,591 units [1]. If the total number of problems reported by Ford Mustang owners in the last 14 years is 203, and the age of the vehicle is 14, the PPMY index can then be calculated as
PPMY Index = 203 / 42,591 / 14 * 1000 = 0.34.
For more information, refer to this page: A study of reliability comparison across Ford Mustang model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2009 Ford Mustang in 2009.
| Service Year | Number of Problems |
|---|---|
| 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 Ford Mustang, the following table can be used to compare the 2009 Ford Mustang with the Ford Mustang from other model years. Note that the number of problems reported for the 2009 Mustang is 203 while the average number of problems reported for the 29 model years of the Ford Mustang is 295.