I had the same problem. I found that the problem was actually a broken hinge. The spring was fine. The first photo shows the broken part. The second show a new hinge with the part number on the label.
2001 530i/5 S+P CDV delete/Akebono ceramic pads
M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD
BMWCCA Member #337964