It seems to me that the biggest problem with reporting FD failures to the NHTSA is that there is no consistent (standardized) way to file these failures so that all BMW FD failures show up in the same "group".
Since the FD failures cross BMW motorcycle models, model years, and now even fundamentally different FD designs, there is no way the NHTSA has a clue about this problem!
The 5th level classification is Component. Listed below are the choices I encountered this morning for a 1999 BMW K1200LT:
1. Power Train
2. Power Train:Axle Assembly
3. Power Train:Axle Assembly:Axle Shaft
4. Power Train:Axle Hub
5. Power Train:Drive Line
6. Power Train:Drive Line:Differential Unit
7. Power Train:Drive Line:Drive Shaft
8. Power Train:Drive Line:Universal Joint
When I explored a 2002 BMW K1200LT, the 5th level component choices were:
1. Power Train:Drive Line
2. Power Train:Drive Line:Center Bearing Support
3. Power Train:Drive Line:Differential Unit
4. Power Train:Manual Transmission
5. Power Train:Manual Transmission:Floor Shift Assembly
This is horse manure - no wonder BMW is getting away with what could become murder under no warning or unrecognized "lock up" with oil dump on rear tire.
I request permission to copy El Jeffe's Rear Drive Survey results (172 records) to a public MySQL database I am going to build today at www.bmwfinaldrive.com
Please give me a few days to get this website ready for viewing and incident posting.
2002 R1150RT - 110,000 miles
FD carefully maintained including PM bearing and seals replacement at 96,000