Oxygen Sensor

Well I heard from an acquaintance that my model has 2 Oxygen sensors. The problem is that one (or both) of them is failing but I can't afford to have the mechanic replace it. The part is fairly inexpensive but the labor is what kills me. It sounds like an easy fix but I don't know much about it. I'm only 17 and this my first car which I'm having trouble maintaining it due to lack of funds. If someone could please walk me through replacing this part I would greatly appreciate it.

But How do I go about replacing it? I don't meant o sound aggressive but do I have to remove other parts, do I have to disconnect the battery? Do I need a specific tool? Things like this are what I need to know.

You can buy a special removal tool, but for the same price or a little more, you can get a whole set of crowfoot wrenchs. Of course, there's metric and SAE so buy the set that has the proper size for your oxygen sensor(s).

You'll also need a 3/8" ratchet and a couple long extensions.

When you replace them, make sure you put some anti-seize on the threads of the oxygen sensors before you screw the new ones in. The new sensors should already have some applied at the factory, but if not, then buy a tube and apply it yourself.