How to Install O2 Sensor 00-05 Toyota Celica GT/GTS

Today my check engine light came on for both O2 sensors and coolant temperature sensor. I check my temperature sensor and nothing was wrong so just replace both O2 sensor with some used ones I had. My muffler shop thought he was slick and gave me an aftermarket one when he install my cat and messed up the threads. I had to go to autzone and retread it with a special tool. All you need for this job is a 3/8 wrench or a big crescent wrench and of course a jack and jackstands