Compatibility: 1999 Toyota 4Runner 2.7L Q&A: Q:What is Differences Between upstream and downstream O2 Sensor? .
?2pcs Up & Downstream for 05-06 Toyota Matrix 1.8L Air Fuel Ratio Oxygen Sensor
OEM 2Pcs Up&Downstream O2 Oxygen Sensor Fit For 1999-2000 Honda Odyssey 3.5L
OEM 2Pcs Up+Downstream Oxygen O2 Sensor for 2001-06 Mitsubishi Montero 3.8L 3.5L
Oxygen Sensor For 2001-2004 Toyota Tundra 3.4L 2pcs Up+Downstream Air Fuel Ratio
2pcs Up & Downstream for 05-09 Lexus GX470 4.7L Air Fuel Ratio O2 Oxygen Sensor
2pcs Up & Downstream Fits 2004-2005 Honda Civic 1.7L Air Fuel Ratio O2 Sensor
