If you are reading this message, you probably know what this is all about. You have gone through multiple 'check engine' light episodes, have replaced multiple oxygen sensors, and are on your third or fourth catalytic converter. I had a 2004 Legacy wagon with 80,000 mi, and my friend (still) has a 2004 Outback. We both have had the same experiences, so these problems are certainly not isolated incidences. In fact, my mechanic told me that has seen all kinds of creative means to disable the 'check engine' light. However, if you live in New York State and need to pass the annual emission test, you will have no choice but to fix the problem. In my case, I also had a transmission replaced, and had a cruise control problem that was unfixable (Subaru started an investigation, but were unable to find the causes of the problem). To retain my sanity, I finally traded the car in on a BMW and took a financial hit.