My GF's WRX developed an unexplained check engine light, so I take it to the dealership.... they say that something "chewed through" the wires of the O2 sensor so it isn't coverable under warrenty. Personally I think it is BS and they are trying to screw me out of $450.
I think this is the rear O2 sensor they are talking about, but I will verify and post again when I get home. I am on the dealerships computer at the moment.
I assume I can get a new sensor for between $50 and $100.... where can I get one?