I checked the sensors and didn't see any obvious damage. I asked a fellow on MSF parting out his MS6 for his, waiting for him to remove them. I believe they are about $85 a piece from Mazdaspeed. I'm going to double check all the plugs and diff harnesses this weekend.
I don't really drive the car hard on my daily commute and am so used to all the warning lights on my dash I always forget to check everything out until I'm stuck at my desk at work. haha. But it's certainly at the top of my list to get it resolved, repaired and back to AWD. It's depressing having a FWD MS6. lulz.