I have a rattle coming from the rear right side of my 04 g35 coupe. I can only hear it when A) i'm accelerating above 65-70 mph and B) I'm turning my steering wheel to the right (like when I'm changing lanes at 70mph from left to right). I have no idea what this could be. At first I thought it was coming from the inside of the car, but now I think it has to be from the outside, maybe in the back right wheel well? It just sounds like a loud rattle, almost like something is loose.

Anyone know what this could be?

thanks

 

I have a rattle/knock on the rear end of my car as well... .but it only does it when I go over bumps or if I really hammer the throttle hard from a low speed. I just assumed it was shock bushings, but I'm not going to worry about it until next year since I'll be putting the car away for winter storage sometime within the next 4 to 6 weeks. I'll probably worry about fixing it next year when the weather is warmer.

 

damn Coupes... always making noises....

but seriously, check the bushings like partyman66 said! Could be the culprit