i got code 05 12, i believe people say thats the right rear o2 sensor. where is that actually located. i got a 99 5spd. pls advise. thanks

 

I have a 99. Mine has 2 front and 1 rear. Bank 1 sensor 2 is what the rear is called. The rear was located right behind the Cat. Very easy to change if you get it loose quickly. Just jack the car up and get under the middle and you will see it screwed into the pipe w/cord and a wiring harness. Look up into the front sections for the other 2. If you are Cal spec, I don't know much about where yours are located.