I posted this on another board that had a thread about this but I'll copy and paste it here.

Here is the information from NHTSA's website:
March 2, 2017 NHTSA Campaign Number: 17V138000
Front Driveshaft Universal Joint may Fail
If the front universal joint fails, the front wheels would not be driven, affecting vehicle traction. Additionally, continued driving of the vehicle with a broken front universal joint may damage other components. Either condition may increase the risk of a crash.


NHTSA Campaign Number: 17V138000

Manufacturer BMW of North America, LLC

Components POWER TRAIN

Potential Number of Units Affected 121,737

Summary

BMW of North America, LLC, (BMW) is recalling certain 2011-2013 X5 xDrive35i, X5 xDrive50i, X5 M and X5 xDrive35d vehicles, 2011-2014 X6 xDrive35i, X6 xDrive50i and X6M vehicles, and 2011 x6 ActiveHybrid Vehicles. Water and debris may enter the front driveshaft's universal joint, causing excessive wear and possibly resulting in the joint's failure.

Remedy

BMW will notify owners, and dealers will replace the front driveshaft, free of charge. The recall is expected to begin April 24, 2017. Owners may contact BMW customer service at 1-800-525-7417.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

8 Affected Products

Vehicles

MAKE
MODEL
YEAR

BMW X5 2011-2013
BMW X6 2011-2014
BMW X6 ACTIVEHYBRID SAC 2011
https://static.nhtsa.gov/odi/rcl/201...997.1488825810
https://static.nhtsa.gov/odi/rcl/201...997.1488825810