2pcs for 1999 Subaru Legacy 2.5L Upstream Downstream Oxygen Sensor O2 02

2X for 1999 Subaru Legacy 2.5L Upstream Downstream Oxygen Sensor O2

2pcs for Mercury Mystique 2.5L Sable 3.8L Upstream Downstream O2 Oxygen Sensor

2X OEM Up & Downstream Oxygen O2 Sensors For Subaru Forester Impreza Legacy 2.5L

2X for 1999 Subaru Legacy 2.5L Upstream Downstream Oxygen Sensor O2

2X Fits 1999 Subaru Legacy Legacy Upstream+Downstream Oxygen o2 02 Sensor

?Downstream for 1996-1998 Subaru Legacy 2.2L 2.5L o2 02 Oxygen Sensor Post Cat