Compatibility: 2000 Toyota 4Runner 2.7L 1997 1999 Toyota Avalon 3.0L Q&A: Q:What is Differences Between upstream and downstream O2 Sensor? .
2x Upstream & Downstream Oxygen Sensor For Honda Civic 1.8L 234-9119 234-4350
2X Upstream & Downstream for 2002-2004 Acura RSX 2.0L Air Fuel Ratio O2 Sensor
2x Upstream & Downstream O2 Oxygen Sensor for Subaru Legacy Outback Impreza Saab
2x Upstream+Downstream O2 Oxygen Sensor For 2009-13 Mazda 6 250-24859 250-25090
?2X Upstream & Downstream Fits 1997 2000 Toyota Tacoma 3.4L O2 Oxygen Sensor
A-Premium 2x Upstream & Downstream O2 Oxygen Sensor for Suzuki Aerio 2002-2007
