Please check fitment notes & description for accurate information. 2008-2009 Buick Allure 3.8L 2008-2009 Buick LaCrosse 3.8L 2008 Pontiac Grand Prix 3.8L 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? .
