One problem related to vehicle overheat has been reported for the 2012 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Kia Motor Optima based on all problems reported for the 2012 Optima.
Driving vehicle and engine started knocking , did not have check engine light and vehicle was not over heating . Vehicle suddenly shut off with no warning on I-10 -exit 505 kerriville texas and thick smoke started coming out of the hood. Vehicle would not start. Never have had any issues with vehicle and did personal oil changes.