This set of 2PCS Upstream & Downstream Lambda O2 Oxygen Sensors is designed compatible with use in 1998-2002Corolla models with a 1.8L engine. These sensors are essential compatible with monito the air-fuel io in your vehicle'ssystem, e optimal engine percompatible withce and reducingemissions. With a direct compatible with design, installation is quick and easy, and the sensors are made frommaterials to ere long-lasting durability. These sensors are also compatible with a range of othermodels, making them a versatile addition to your automotive toolkit. Investing in these Lambda O2 Oxygen Sensors is hoice compatible with anyCorolla owner looking to maintain their vehicle's percompatible withce and efficiency. Don't settle compatible with sur sensors - choose thesesensors compatible with reliable and cue readings every time. Quty: This product incles two pieces of lambda O2 oxygen sensors, both upstream and downstream, which are designed specifically compatible with 1998-2002Corolla 1.8L models. : These sensors are made ofmaterials and are uftured to meet or exceed OEM specifications, e reliable and cue percompatible withce. Easy installation: The sensors are easy to install and come with all necessary hardware, making the installation process quick and hassle-. Improved engine percompatible withce: These sensors play a crucial role in monito and regulating the air-to-fuel io in the engine, which can improve fuel efficiency and overall engine percompatible withce. Cost-effective solution: By repling both upstream and downstream sensors at the same time, this product provides a cost-effective solution to address any issues with the oxygen sensors in yourCorolla.