I had my 2010 G37 xS sedan for maybe around 2 weeks now.

I just noticed starting today that when I drive over bumpy surfaces or any uneven roads i hear this little rattle that sound like a spring inside of my car.

I have been trying moving around everything in the compartments, seats, seat belts, sunglass holder windshield, almost everything but cant seem to find out where that noise is coming from.

I defintiely did not have it till today.

CAN ANYONE HELP ME OUT PLEASE!!! Thank you!

 

Unfortunately, that could be just about anything - are you sure it's inside the car, and not a suspension noise, or a loose brake caliper?

 

Try having someone ride with you and have them try to pinpoint where the noise is.

 

I think i might have had the same problem, does it sound like it is coming from the door. I had screws loose in my driver door and it was making a little noise. But for someone who drives the car everyday it drove me crazy. If your car is new bring it back to the dealer.