02 Oxygen O2 Sensor for 2005-2007 Buick Allure 3.8L After Cat Downstream

02 Oxygen O2 Sensor for 2008-2009 Buick Allure 3.8L Upstream and Downstream 2pcs

Downstream for 2008-2009 Buick Allure LaCrosse 3.8L Oxygen O2 02 Sensor

2pcs Upstream+Downstream O2 02 Oxygen Sensor for 2005-2007 Buick Allure 3.8L

2pcs Upstream Downstream O2 02 Oxygen Sensor for 2005-2007 Buick Allure 3.8L V6

For 2005-2007 Buick LaCrosse 3.8L Oxygen O2 Sensor 02 Upstream+Downstream 2pcs