I didn't know if you guys already knew this, but I figured in case you didn't it would help a few of you out.
If you have an AEM Wideband and find yourself needing a new sensor, but don't feel like paying $90 for one? Head on down to your local parts store, and ask for Bosch part # 17018. It's the same exact sensor, fully calibrated, and ready to go!! Best part? It ranges from $60-$45 depending on store, and comes with a 2/3 year warranty!! What that means is when it goes bad again, just take it up there and replace it!
Now you LC-1 guys I'm not forgetting either. Your Bosch part # is 17014. And your prices range from $45-$30.
Hope this helps you guys out!