[toyomechanic421]

just make sure u get the right part. air/ fuel sensor means before cat, o2 sensor means after the cat. Bank 1 is the head closest to the firewall.And sensor 1 means the first sensor after the cat. use some kind of rust gone or what ever u can cause being heated and cooled so many times makes the threads fragile, if it siezes then u must replace the hole pipe. clear the code by removing the efi fuse if you dont have a scan tool.