800 problems have been reported for the 2011 Chevrolet Impala. The following chart shows the 22 most common problems for 2011 Chevrolet Impala. The number one most common problem is related to the vehicle's electronic stability control with 130 problems. The second most common problem is related to the vehicle's engine and engine cooling (123 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 2011 Chevrolet Impala in the United States are 177,624 units [1]. If the total number of problems reported by Chevrolet Impala owners in the last 13 years is 800, and the age of the vehicle is 13, the PPMY index can then be calculated as
PPMY Index = 800 / 177,624 / 13 * 1000 = 0.35.
For more information, refer to this page: A study of reliability comparison across Chevrolet Impala model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2011 Chevrolet Impala in 2011.
| Service Year | Number of Problems |
|---|---|
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 |
When making the decision between buying a new or used Chevrolet Impala, the following table can be used to compare the 2011 Chevrolet Impala with the Chevrolet Impala from other model years. Note that the number of problems reported for the 2011 Impala is 800 while the average number of problems reported for the 25 model years of the Chevrolet Impala is 545.