OK i have a 98 gt and its throwing an O2 senor code for bank 1 sensor 2. My question is there any difference in the front and back sensor. The reason I ask is I work at autozone (please save all comments about how stupid autozone and its employees are, I work there I know how bad things are) and can get a senor for around 55 bucks, but the computer say that one sensor will fit all locations, but when I call the local ford place they say there are two different ones and its gonna cost 90 dollars to get one from them. I need to save as much money as possible it being close to christmas and all, but I want to take care of my car. So any info would be nice.