The higherbro Oxygen O2 Sensor is designed for 2003-2004 Toyota Corolla 1.8L models, providing an accurate and reliable solution for your vehicle's emission control system. This 2-piece set includes both upstream and downstream sensors, made of high-quality stainless steel and ceramic materials for durability and long-lasting performance. The sensors have a maximum supply voltage of 5 volts of direct current and an upper temperature rating of 1600 degrees Fahrenheit. With a modern style and one-year quality guarantee, the higherbro Oxygen O2 Sensor is a perfect fit for your Corolla, ensuring optimal engine performance and reduced emissions. Always remember to verify your vehicle's compatibility by checking the 'Select Your Vehicle' option on the product listing before purchasing.