2001 Subaru Forester L AWD 4dr Wagon (2.5L 4cyl 4A)
We bought our 2000 Subaru Forester in 2005. It only had 45,000 miles on it so we thought it was a great deal. A few months down the road it started showing signs of trouble-needed a new o2 sensor, then we have had an ongoing problem with the catalytic converter and have replaced it with a new one a few months ago, now it won't pass inspection-one garage says it is the gasket-another garage says it is a leaking problem and it needs to be welded (catalytic converter) also brakes also the cv boot was cracked and needed to be replaced-it is a constant drain of money-trading it in for something more reliable! Subaru is horrible!
The reason that the O2 sensor would go out is because of poor driving, either red lining it or just generally abuse the engine. the reason the catalytic converter went out is because the O2 sensor wasn't replace soon enough and the catalytic converter couldn't manage the fumes that were coming out of the engine. They are hand in hand. The problems was from your neglect. My Subaru is a 2001 forester 2.4L with 180,000 Miles and i am just barely having issues with the sensor. But i bought the part and am going to install it myself because I DON'T NEGLECT MY CAR!!!!