Cross post from this thread as well:
https://g87.bimmerpost.com/forums/sh....php?t=1903609
Ok so I’ll admit that I fucked up a bit. See when I did my testing it was abnormally warm out. Fast forward 2 weeks later and it got cold in the Midwest (like it should be) and the noise returned… I ripped apart and removed rear deck and I still heard the noise WITHOUT the parcel shelf in the vehicle. It just so happened that when I did my initial testing it was warm and my car doesn’t make much noise at all when it’s warm, so I was convinced the noise was from the parcel shelf.
So last week I took my car to the dealer. They confirmed they heard the noise and replaced the rear passenger shock absorber. The car still makes the exact same noise. They could have opened a case with BMWNA but decided not to (they consulted with me first) since I have a tuned trans. They advised I remove the tune and bring it back so BMWNA doesn’t void part of my warranty if they see the tune.
So I am I still experiencing the rear thumping noise after my rear deck lid fix. It is important to note that my fix DID permanently resolve vibration noises when blasting songs with bass, but it is not entirely the cause of the thumping noise I am hearing. I am busy the next couple of weeks but I will post here if/when there are any suspension updates. They tested another M240 on the lot and it also had the noise. I am not sure what year that was but I’m assuming it was brand new.
TO EVERYONE IN THIS FORUM! If you are hearing the suspension noise, this fix may help depending on the source of the noise. My rear parcel shelf DID make some noise but it was NOT the cause of the thumping. If you are hearing thumping sounds from the rear suspension, please bring your car to the dealer if you can, after the holidays of course. We need BMWNA to properly investigate this issue and maybe issue a service bulletin or recall. Thank you all and have a merry Christmas and happy holidays!