A faulty Oxygen Sensor is a primary reason for Failure of a Catalytic Converter. Car Manufacturers Recommend Replacement of O2 Sensors at 60,000 miles. If you are purchasing a New Catalytic Converter be sure the Oxygen Sensors are Checked and Operating Correctly!
FRONTIER WITH 3.3L FRONT CAT BOLTS TO MANIFOLD DRIVERS SIDE TEST GROUP 1NSXT03.5C9A LEV1 LEV OR 1NSXT03.3C5B LEV LEV1 OR 1NSXT03.3C5A LEV LEV1 CA OR NY APPROVED - CARB COMPLIANT PER CARB REQUIREMENTS THE TEST GROUP SHOWN HER