wow, and just yesterday i went on subaruonlineparts and saw $197! thank god i came across this thread lol
did replacing your O2 solve your problems? i'm having this idle problem where sometimes, when i start the car, the afr is unsettling with a low rpm idle, or ridiculously rich with a low idle, no cels in both scenarios. and im debating between maf and O2 as the culprit