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!
PATHFINDER WITH 4.0L FRONT CONVERTER ASSEMBLY BOLTS TO ENGINE PASSENGER SIDE BANK 1 TEST GROUP 6NSXT04.0G6A LEV2 ULEV CA OR NY APPROVED - CARB COMPLIANT D798-14 PER CARB REQUIREMENTS THE TEST GROUP SHOWN HERE MUST MATCH THE TEST GROUP OF YOUR VEHICLE. CALL FOR ASSISTANCE IF NEEDED (713)722-9212