I feel like this is a dumb question but I have a 09 G37x sedan...I haven't found much about the awd on our cars but I found in another forum that there not FULLTIME AWD? Moral of the story I had to replace my rears because they were practically slicks...but fronts still have a little bit of life left, will I be fine and not damage the AWD system? I know that on most AWD cars you should really be in a certain percentage of tire wear..

 

That's normal wear for your rear-biased AWD setup, as long as your front tires still have some room to the wear bars you'll be OK. This assumes your new rear tires are the same brand and size. If by chance you bought a different brand tire the sizing may be a bit different even if the size stamped on the sidewall is the same. If the new rear diameters are more than 1% different than your old fronts you may activate the AWD warning light going at higher speeds. If this occurs you will need to get new matching front tires.

 

I did some research when selecting my new tire sizes and it appears that out AWD system is VERY sensitive. As Brad said, anything over 1% WILL MOST LIKELY activate the AWD light.

 

Ok so as long as my AWD light doesn't come on I should be fine? They are a different brand but I've had these tires for over a month now so I'm assuming it would of went on by now if it was an issue?

 

Probably OK, the faster you drive the more the variance will come into play, so if you've not gone faster than 75 or 80 it may still be an issue at higher speeds

 

Well I drive about 75-80 to work every morning so I guess I'm good to go