I am considering moving up to an NC in the future. I have ignored this model for too long and it has really garnered my attention!

What are some of the known issues and common problems to look for when buying a used one? Besides external styling, what are the mechanical differences and changes that makes one year better than another? Are there letter or number identifiers in the VIN that tell the options, such as LSD?

Any other tips in general?

Thanks!