E30M3 Race F10 535 R1150Rt M Coupe
Glad you found/fixed it.Solved: E46 BMW ratting rear. Loose top shock mount nut (17mm)
Rattling sound was coming from the rear parcel shelf.
Was not related to acceleration or braking.
Rattling even while coasting at 5mph.
It was a loose top shock bolt (17mm)
I tightened it and the rattling is gone.
When you replace the rear shock, make sure the top cup washer nut is tight.
That will EAT a RSM.