Kwiksen 2pcs Upstream and Downstream Oxygen O2 Sensor 234-4162 234-4154 for 1996-2000 Toyota 4Runner 2.7L 3.4L PART NUMBER:234-4154 x1,234-4162 x1 Upstream & downstream O2 Oxygen Sensor for 1996-2000 Toyota 4Runner 2.7L L4 Length: 234-4145 350mm/ 13.78", 234-4162 305mm/12" This is Brand New & High Quality Aftermarket Product. Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase