Mazdatrix sells an O2 sensor for $127.29
rx7.com sells an O2 sensor for $40.00
O'Reilly auto parts sells an O2 sensor for $17.99

Now I know that sometimes parts can be cheaply made, but really, 500% more from mazdatrix? Considering the ease of replacement, would it be worth it for me to try the O'Reilly o2 or could I actually damage something here.

 

pick up the cheaper one.
fromt he old(stock?) one, take the connector and splic it into the new one.

Done

 

I bought one from Auto Zone for $27.00 or so... it's a single wire. Like the stock one. All I had to do was splice the new O2 sensor's wire with the old O2 sensor's connector and then plug them in.

 

Ok thanks, will do that this weekend.

 

It even comes with a little kit and instructions on how to splice them together.

The Mazdatrix one is so expensive because it already has a new connector, so it's plug and play.

 

Wow, $100 to save me 2 minutes... awesome....