How to Replace 2007 - 2012 Rav4 O2 Sensor

Is your dash lit up like a Christmas tree? Check engine, 4WD, Traction Control? You need to read your computer codes (Autozone can do it). If it is Code P0138, then your rear 02 sensor is faulty ( bank 1 sensor 2 ).
Fret not! The fix is simple and you can do it yourself without any special tools. Just follow the steps in the video.
ATTENTION: In my case, it was not sensor 2 (O2) and instead was sensor 1 (Air/Fuel). If A/F goes bad it can trick the computer into thinking sensor 2 is misreading due to the extra lean or rich condition caused by sensor 1 being bad. Yeah, modern cars can be a pain....
I recommend using an OE Toyota or Denso sensor as we don't want any problems.