The Oxygen O2 Sensor NGK 25199 is a direct fit rear downstream sensor designed specifically for Hyundai and Kia vehicles. It is manufactured by NTK (Ngk-Group) in Japan and comes with a 1-year manufacturer warranty. This oxygen sensor is designed for models such as the Hyundai Santa Fe Sport, Sonata, Tucson, Optima, Rondo, Sorento, and Sportage, as well as Kia Forte, Forte5, and Forte Koup. It is a high-quality replacement part that ensures accurate measurement of oxygen levels in the vehicle's exhaust system, promoting optimal engine performance and emission control.