Please check fitment notes & description for accurate information. 2004-2005 Cadillac CTS 5.7L 2005 Saab 9-7x 5.3L Oxygen Sensor's Location: How do I know the O2 sensor is good or not? Check engine light on A reduction in fuel economy. Your catalytic converter fails unexpectedly Exhaust emissions reach undesirable levels. How to install the oxygen sensor? .
