One problem related to manifold/header/muffler/tail pipe has been reported for the 2012 Kia Motor Optima Hybrid. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Kia Motor Optima Hybrid based on all problems reported for the 2012 Optima Hybrid.
While driving the vehicle on the highway upon acceleration the rpms spiked and there was a clicking noise. After releasing the accelerator there was a loud noise like a broken muffler then the car lost power. Pulling to the shoulder the car began to smoke and shortly after stopping the vehicle caught fire from somewhere under the hood which spread to the entire front of the vehicle which then became engulfed in flames before a fire crew could extinguish.