Up for sale is a KW V3 Coilover kit. These came off my E93 which I bought a few months ago. I am not sure about compatibility with other E9X series. I have taken pictures of the part numbers to help.
Usage: These have about 20k miles on them all by the previous owner. The previous owner removed them because during PPI the sway bar mount was found to be broken on the front left strut. I sent the entire kit to KW. It looks like the front two struts are new and they cleaned up the rear struts with new bolts and redyno'ed/reset to factory specs. There are also new dust boots and bumpstops on all the struts.