Used on: Hyundai Grandeur, Hyundai Santa Fe, Hyundai Sonata, Hyundai Tucson, Kia Optima, Kia Sorento, Kia Sportage

The 2.4-liter Hyundai-Kia G4KJ or 2.4 GDi petrol engine has been produced since 2009 and is installed on such popular models as Optima, Sonata, Santa Fe, Sorento and Sportage. This unit is distinguished by the presence of a GDi direct injection system and a block of balancing shafts.

In 2010, a new 2.4-liter engine of the Theta II line, equipped with GDi direct fuel injection, debuted on the American versions of the Hyundai Sonata YF and Kia Optima TF sedans. In all other respects, this is a typical power unit of the line with an aluminum cylinder block, cast-iron sleeves and an open cooling jacket, CVVT phase regulators on two shafts, a 16-valve head without hydraulic compensators, a timing chain and VCM and VIS systems in the intake. Like many large displacement 4-cylinder engines, it is equipped with a block of balancer shafts.