Kia engines are usually made in Korea, China, and possibly the United States.
In China, the motors are produced in Jiangsu Province in a collaboration between Kia, Dongfeng Motor Group, and Jiangsu Yueda Group. And Autoland Gwangmyeong, once known as the Sohari Plant, is where most of Kia’s first cars, engines, and components were—and continue to be—built in South Korea.
As for manufacturing in the States, Kia Motors Manufacturing Georgia (KMMG) located in West Point, Georgia has its own gearbox and engine shops.