2pcs O2 02 Oxygen Sensor Upstream & Downstream Fits 06-2008 Buick Lucerne 3.8L

2pcs O2 02 Oxygen Sensor Upstream&Downstream Fits 1997-2003 Buick LeSabre 3.8L

2pcs Upstream+Downstream for 2005-2007 Buick LaCrosse 3.8L Oxygen o2 02 Sensor

2pcs for Buick Lucerne 04-2008 3.8L 1 Upstream & 1 Downstream Oxygen Sensor O2

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

2pcs O2 02 Oxygen Sensor Upstream Heated Fits 2005-2009 Buick Allure 3.8L

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