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 YGMXV03.8044 LEV LEV1 OR YGMXV03.8901 LEV LEV1 CA OR NY APPROVED - CARB COMPLIANT D193-114 PER CALIFORNIA AND NEW YORK REQ