This thread is too quiet, and it's been fun (for me, at least) to read... So, I hope the semi-necro is OK. (Please no ban? lol)
I replaced my knock sensor on Monday (yay, one DTC gone, only one to go before November!). Rockauto is awesome. Ordered the part around 3AM MST Friday, I think. Part shipped 11AM MST Friday. Arrived some time Saturday morning while I was at work. "3-5 day USPS Ground" shipping FTW? Supposed 5-10 minute job (according to every forum post/Youtube video I watched) turned into an hour. Mostly because of me being me...
It went something like this: *struggles to break bolt loose with a slightly-too-short socket for 20 minutes, finally gives up*
jlee: You know, things are easier when you use the right tools...
Me: Dad, can I borrow a socket extension?
Dad: What for?
Me: To replace my knock sensor?
Dad: It's probably just the wiring, you probably don't need to replace the whole thing.
Me: So... Can I borrow an extension? >.>
With the proper tool, and another 5 minutes of struggling (again) to break the bolt free, it finally came off. Surprise of surprises, just like half a dozen threads on NASIOC suggested, the sensor was cracked (and I wouldn't be surprised if it was over-torqued, with how much effort it took to get the bolt out). Another 10 minutes of trying to squeeze my hand into a space not intended for hands to fit in to get the screw to thread into the hole with the sensor facing the right direction, and it was finally done. Code is gone, yay! Oddly, CEL for the catalytic converter hasn't actually come back yet, just a pending code.
Today, I discovered (partly due to the relevant thread floating around here somewhere) that my car had no cabin air filter at all, which is apparently common on certain years and models of Subaru's... So, I threw one in. I also came to the conclusion that my paint is hopelessly un-fixable (short of the exdeath/jlee type of "fixing" it via either repainting the car, or replacing the car...), so I'll just have to deal with it.
Next up, in "The Broken Subie Saga", we'll start with Episode 5: Learn how to replace catalytic converters! That'll happen some time Soon. Soon being... Some time before November, when emissions are due. lol