It is built on the same platform as a G8 and the build quality is supposed to be about the same. I have a G8 with over 15K miles on it and the car still is very tight. I think a lot of it has to do with how you keep care of your car too. There are a lot of 4th Gens that rattle a ton, but my 99 with 31K miles is still very tight w/o many rattles at all.