ACDelco Oxygen Sensor - 12665061 Part #: 12665061 Line: ACD ACDelco Oxygen Sensor 1 Year Limited Warranty Number Of Wires: 4 Thread Size: M18-1.50 Terminal Type: Blade Connector Shape: Rectangle, Triangle Terminal Gender: Female Hex Size (mm): 22mm Attachment Method: Screw-In Overall Length (in): 15-3/8 Inch Overall Length (mm): 390mm Hex Size (in): 7/8 Inch Heated: Yes Show More Show Less