Features: * 100% test before shipment * The reduction of harmful emissions * The increasing of fuel economy * The improvement of engine performance * Prevent premature failure of the catalytic converter. Specification: OE number: 12499877, 234-5060, 226936M400, 226937S000, 226937 Replacement: Direct Plug-In Replacement Condition: 100% Brand New Note: Please confirm the OE number before purchasing!!! Fitment: 2005 Cadillac CTS Base 6Cyl 2.8L 170CID O2 Oxygen Sensor 2005 Cadillac CTS Base 6Cyl 3.6L 217CID VIN 7 O2 Oxygen Sensor 2004 Cadillac CTS Base 6Cyl 3.6L 217CID VIN 7 O2 Oxygen Sensor .
