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

2pcs O2 02 Oxygen Sensor Upstream&Downstream Fits 1997-2003 Buick LeSabre 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

O2 Oxygen 02 Sensor For 2008-2009 Buick LaCrosse 3.8L Upstream+Downstream X2

For 2005-2007 Buick LaCrosse 3.8L 2 Pcs Downstream Upstream Oxygen O2 Sensor

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