I have a 2002 tt 225hp coupe. When the car goes over bumps or slightly rough road it sounds like there is a "chirping" sound or high pitch squeak coming from the rear suspension. I also get this when I close the trunk lid or sometimes either of the doors. I've replaced the rear sway bar bushings and strut mounts as these were making a different noise and were worn a few months back but this new chirping/squeak is new. Anyone have any ideas what it could be?

Thanks

 

Found out it was the heat shield above the exhaust that had loose nut and would cause squeaking.