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!
PASSAT 4 MOTION W8 WITH 4.0L MANIFOLD CONVERTER DRIVERS SIDE BANK 2 TEST GROUP 4VWXV04.0229 LEV LEV1 CA OR NY APPROVED - CARB COMPLIANT D193-124 PER CARB REQUIREMENTS THE TEST GROUP SHOWN HERE MUST MATCH THE TEST GROUP OF YOUR VEHICLE. CALL FOR ASSISTANCE IF NEEDED (713)722-9212 F Y