1,373 problems have been reported for the 2015 Kia Motor Optima. The following chart shows the 23 most common problems for 2015 Kia Motor Optima. The number one most common problem is related to the vehicle's engine and engine cooling with 631 problems. The second most common problem is related to the vehicle's equipment (138 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 2015 Kia Motor Optima in the United States are 215,029 units [1]. If the total number of problems reported by Kia Motor Optima owners in the last 11 years is 1373, and the age of the vehicle is 11, the PPMY index can then be calculated as
PPMY Index = 1373 / 215,029 / 11 * 1000 = 0.58.
For more information, refer to this page: A study of reliability comparison across Kia Motor Optima model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2015 Kia Motor Optima in 2015.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 |
When making the decision between buying a new or used Kia Motor Optima, the following table can be used to compare the 2015 Kia Motor Optima with the Kia Motor Optima from other model years. Note that the number of problems reported for the 2015 Optima is 1,373 while the average number of problems reported for the 20 model years of the Kia Motor Optima is 511.
| Model Year | Number of Problems |
|---|---|
| 2020 Optima | |
| 2019 Optima | |
| 2018 Optima | |
| 2017 Optima | |
| 2016 Optima | |
| 2015 Optima | |
| 2014 Optima | |
| 2013 Optima | |
| 2012 Optima | |
| 2011 Optima | |
| 2010 Optima | |
| 2009 Optima | |
| 2008 Optima | |
| 2007 Optima | |
| 2006 Optima | |
| 2005 Optima | |
| 2004 Optima | |
| 2003 Optima | |
| 2002 Optima | |
| 2001 Optima |