Kia Optima engine problems by year
3,126 NHTSA owner complaints name the engine across 19 Optima model years. The most reported year is 2015 with 618 reports.
| Year | Engine reports | Share | Median mileage | |
|---|---|---|---|---|
| 2020 Optima | 92 | 67% | — | |
| 2019 Optima | 86 | 42% | 65,000 mi | |
| 2018 Optima | 129 | 56% | 66,000 mi | |
| 2017 Optima | 161 | 64% | 71,000 mi | |
| 2016 Optima | 423 | 56% | 90,500 mi | |
| 2015 Optima | 618 | 62% | 88,000 mi | |
| 2014 Optima | 280 | 48% | 89,000 mi | |
| 2013 Optima | 610 | 44% | 100,000 mi | |
| 2012 Optima | 398 | 43% | 102,500 mi | |
| 2011 Optima | 254 | 43% | 101,500 mi | |
| 2010 Optima | 9 | 12% | — | |
| 2009 Optima | 14 | 12% | 70,000 mi | |
| 2008 Optima | 18 | 13% | 96,000 mi | |
| 2007 Optima | 16 | 10% | 99,560 mi | |
| 2006 Optima | 7 | 5% | — | |
| 2004 Optima | 3 | 1% | — | |
| 2003 Optima | 2 | 1% | — | |
| 2002 Optima | 4 | 4% | — | |
| 2001 Optima | 2 | 1% | — |
Share is the fraction of that year’s complaints naming the engine. Raw counts are not adjusted for sales volume — years that sold more units naturally accumulate more reports.