Delphi ES20321 Oxygen Sensor OE connectors and wire lengths for easier, faster installation Product line features 3 times more planar sensor technology coverage then the nearest competitor Patented planar sensor construction and design for long lasting, reliable operation over the life of the sensor Unique sensor-coatings protect the sensor elements from contaminants that can trigger "check-engine" lights and premature sensor failure Product line features 3 times more planar sensor technology coverage then the nearest competitor Delphi is an original equipment brand that partners with other manufacturers to supply the parts your car was originally built with. This product is in a Delphi package, note that the part may have been manufactured by an independent Delphi supplier.