I have an 04 G35 coupe, absolutely love it I've had it for a little over a year. The car rides very rough, every bump or hole in the road is really harsh. Shakes the car a lot and can feel it in the seats, doesn't feel like its supposed to. Its pretty much been like this since I got it, maybe its got a little bit worse but can't really tell. I've had to replace front lower control arms, what could be causing the car to ride rough and not be able to take bumps and holes as well?

 

Have a professional suspension mechanic look at the shocks, and the bushings. Likely a rattling mess down there. My g is quiet as a mouse, but very road compliant. great feedback (poly bushing).