One problem related to manifold/header/muffler/tail pipe has been reported for the 2013 Kia Motor Sportage. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Kia Motor Sportage based on all problems reported for the 2013 Sportage.
Driving straight down the highway in the mountains, the car stalled 3 times when I would let off the gas. It began making a noise like the muffler wasn't working, then a knocking noise under the hood, and the noise under the hood got louder. I had the car towed to my repair shop. He told me the engine needed to be overhauled or replaced. I spoke to the dealer, the said the same thing. They want $9,800 to replace the engine.