I have experienced the rear suspension noise, and front suspension noise too, but mine is an 05. I've had everything out of the trunk including all the carpets and spare/jack etc. It may be coming from the battery compartment but I'm not going to poke around in there for obvious reasons. Dealer says all is well and tight. Seems like when the tires are over 40psi this happens. I always keep my psi over 40 so guess I'll have to live with the noise. Also, while sitting in the driver's seat, trans in P, engine off, emergency brake on, I hear a rumbling noise if I wiggle around in the seat. With the brake off, no noise.
