Front 12mm oxygen sensorGray connector 52'', 4 wirePrecision made consisting of a ceramic body made of stabilized zirconium dioxide, surface coated with gas-permeable platinum electrodes and a porous ceramic to aid the prevention of erosion due to contamination and particulates in the exhaust gasesSlow oxygen sensors can cause a drop in fuel economy of 10-15%, excessive exhaust emissions and poor drivabilityLife expectancy of an average oxygen sensor in a properly tuned engine is typically 30,000 - 50,000 milesMeets or exceeds OE specificationsMade in the U.S.A.