4PCS Oxygen O2 Sensor Up/Downstream for Buick for Cadillac for Chevy for GMC for Hummer for Saab

Condition:New|Brand:Unbranded|Features:Direct Fit, Easy Installation|Manufacturer Part Number:12609456, 12589321, 2344337|Number of Sensors:4|OE/ Part Number:12589321, 12597989, 12609456, 2344258, 2344337|Placement on Vehicle:Upstream+Downstream|Sensor Type:Heated|Type:Oxygen Sensor|UPC:Does not apply