We have provided the following:
- BMW Navigation Firmware Operating system V32
- BMW Navigation Firmware Operating system V30
- BMW Navigation Firmware Operating system V29
- BMW Navigation Firmware Operating system V25
these can be obtained from our downloads page here
All of them are untouched original BMW firmwares to upgrade/reinstall MK3 + MK4 drives, check compatibility/drive status before upgrading.
If you need to know how to upgrade please see our post on this here