So for the past month ive had a terrible squeak coming from my rear passenger side, (possibly just a shock) The noise occurs around 65 and once im at that speed it continues till i slow down to around 30mph. At first i thought it may be my rear hatch hinge on the passenger sider but i found that its louder with windows open and is certainly coming from beneath. Next i put it on a lift and compressesed the shock to see if it made any noises, But heard nothing. Lastly i thought that the heat shielding may be causing it so i removed some of the non essential stuff and PB blasted most of the suspension for good measure. But yet it still continues. It basically sounds like a cricket on steroids. Any suggestions before a go buy new shocks?
It has been lowered and has Eibach springs FYI

 

check your rubber stops on the underside of the hatch, if its not tight it can rub/squeak from the air pressure moving the hatch. so it only happens when you get up to speed.
happened to me a few weeks ago.

 

You can also lower the back seat. I had the seat latches squeak before.
I think that's it for the inside.

Outside, try pushing down on each corner of the car, maybe with a buddy so see if you can make it happen. Go over a speed bump, does it happen when the front or the rear go over?

 

just the rear passenger side luckily

 

It could also be as simple as your brake pads getting worn. When a pad gets low enough theres a metal piece that is designed to start rubbing to indicate that it's time to change it out. Might only be loud enough to hear once you get above 30 mph.