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 4.0L REAR UNDERBODY CONVERTER ASSEMBLY BOLTS TO FRONT CONVERTER DRIVERS SIDE TEST GROUP GNSXT04.0G6A 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