I've been shopping around and pricing the pre-cat 02 sencor for my 03 wrx. The dealership will charg $190 which is the best price I have found. But I have also found on some online parts stores the same sensor, but it is a universal sensor so I'm sure it doesn't work quite as well. They are only charging $33 for theirs. Does anyone know why they are so cheap? What is the worst that could happen if I put on the Universal? Any input would be great. Thanks!