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!
BONNEVILLE WITH 3.8L CONVERTER ONLY DOES NOT INCLUDE RESONATOR MAY REQUIRE SOME MODIFICATION TEST GROUP 4GMXV03.8041 LEV LEV1 CA OR NY APPROVED - CARB COMPLIANT D193-114 PER CARB REQUIREMENTS THE TEST GROUP