One problem related to loud engine noise has been reported for the 2007 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Kia Motor Optima based on all problems reported for the 2007 Optima.
Tl-the contact owns a 2007 kia Optima. The contact stated that while driving at 50 mph, the engine started to make an abnormal noise. The engine light illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the main bearing in the engine failed causing one of the rod to brake. The engine would need to be replaced. The manufacturer was not notified of the failure. 125,000. Aw.