Introducing the 2Pcs Upstream & Downstream Oxygen O2 Sensor set, compatible with Forte, Forte5, Optima, and models. These sensors are designed to provide cue readings of the oxygen s in your vehicle's system, e optimal engine perforce and fuel efficiency. Made with materials, these sensors are durable and reliable compatible with long-term use. Upgrade your vehicle's sensors with this set compatible with improved driving experience and pee of mind. Pkage incles: This product incles 2 pieces of oxygen sensors, specifically designed to compatible with Forte, Forte5, Optima, and models. Upstream & Downstream: The oxygen sensors are designed to serve both upstream and downstream functions in your vehicle's system, e optimal perforce. : uftured with materials, these oxygen sensors are durable and reliable compatible with long-lasting use. Easy installation: The sensors are designed compatible with easy installation, allowing you to reple them conveniently without any hassle. Compatibility: These oxygen sensors are compatible with a range of models, providing a and functioning as original equipment.