One problem related to brake sensor has been reported for the 2015 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Kia Motor Optima based on all problems reported for the 2015 Optima.
Engine seized while driving and wouldnt start. I bought a new battery and tried to start it and it almost caught on fire. I had it towed to a kia dealer and they replaced the engine and the turbo system which had a recall on it in 2016that was for the knock sensorsystem on 2018/.