Precision manufactured with a ceramic body made of stabilized zirconium dioxide, surface coated with gas-permeable platinum electrodes and a porous ceramic to help prevent erosion due to contamination and particulates in the exhaust gases. Slow reading oxygen sensors can cause a drop in fuel economy of 10-15%, excessive exhaust emissions and poor drivability. Life expectancy of an average oxygen sensor in a properly tuned engine is typically 30,000-50,000 miles. Narrow band O2 sensors available in 12.5in. , 16.25in. and 22.25in. overall lengths. Replacement Wide Band O2 sensor for aftermarket ignition tuners also available; overall length is 30.25in. All sensors meet or exceed OE specifications. Made in the USa.