Just to follow up on this... the speed sensor in the left front wheel was out. Ordered from Scottsdale Infiniti for $130 (about $60 or $70 off dealer retail) and got it in about a week... awesome experience). The local shop threw it in there, and boom... problem solved.
Still getting the airbag light, however. I will probably have to take it to an Infiniti Dealer next time I'm up near Chicago... better start saving for the "diagnostic" fee ;-)
Anyway, new problem... left rear wheel is "bowed" out on the bottom. Crawled under the car, and noticed one of the suspension components seems damaged. I went back and looked at pictures from when I first bought the car, and it seems the wheel was in the same condition... It appears to be called the "lateral arm" and is a pretty cheap part... but I'm just wondering how this goes un-noticed by a dealer on a car taken on a trade that was certified by Infiniti of Lisle outside of Chicago...? Furthermore, this probably accounts for the discoloration of the left side of the rear bumper I'm now seeing... I ran the CarFax on my car, and it shows as accident free... could there be some undisclosed damage from the previous owner on this vehicle? Anyway, this is a link to a picture of the suspension, with the right suspension following it... you can see the difference...
The question is, will replacing this part and getting a good alignment fix this problem? Do I have any recourse with the dealer I purchased the car from? Finally, should I be able to claim treadwear warranty on the Sumitomo tire I purchased 6 months ago that is now worn down to the threads on the inside, assuming I replace the suspension component and take it back to the shop I bought the tire at? I've put about 10,000 miles on it since purchase.
Thanks for all your help guys, hopefully I can get another year and another 20,000 miles out of this beautiful car!
Left (bad)
http://i14.photobucket.com/alb...6.jpg
Right (good)
http://i14.photobucket.com/alb...7.jpg