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Please check fitment notes & description for accurate information.2005-2007 Buick Allure 3.8L2005-2007 Buick LaCrosse 3.8L2004-2005 Buick LeSabre 3.8L2006-2008 Buick Lucerne 3.8L2004-2005 Buick Park Avenue 3.8L2004 Buick Regal 3.8L2004-2005 Chevrolet Impala 3.8L2004-2005 Chevrolet Monte Carlo 3.8L2004-2005 Pontiac Bonneville 3.8L2004-2007 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. .
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