[TheDizzel]

Hi all.

So over the last 6 months or so my e92 lci 335i makes this squeak or more of a chirp noise when going over sparp bumps or rough road. The noise comes from rear left and right. Only audible when the windows are open. Hasn't got worse or better over time.
Originally I though it might be hanbrake shoe related. But after a few tests (going over a bump that makes it chirp every time, with and without hanbrake tension) its exactly the same). Also I have zero squeaks or unable to recreate any noise from pushing, pulling, rocking and jumping in and around the boot

Help