Common problems with the Kia Optima include steering issues and engine failure, as of 2015. The 2006 and 2007 year Optima have a large number of engine failure issues, while the 2013 and 2014 models have high numbers of steering problems.
The 2013 Optima's steering problem is keeping the wheel consistently centered. Many users report that the steering wheel pulls to the side, requiring constant over-correction by the driver.
Another common complaint with the Kia Optima is that the door does not open properly on the 2005 year model due to defective door latch. This defect does not appear to be an issue with later Kia Optima models.