Don't break on of those. Somehow on installing our header the O2 sensor was pulled breaking the wire. Luckily where I work. It only cost $200.00 without labor. Those aren't cheap. The one that is in the cat that one is $400.00.

 

or like 50-80 bucks if you are smart enough to avoid the dealership for an o2 sensor.....

 

Well ya know. I work at one so therefore they help me out. But I didn't have to pay anything. So, that was good.