NHTSA recall 20V185000

What's wrong: The constant-velocity joint which transfers power between the transfer case and the rear drive shaft, may become damaged, possibly resulting in loss of power to the rear wheels.

Why it matters: A loss of power to the rear wheels can affect vehicle control, increasing the risk of a crash. Additionally, when the vehicle is parked after a loss of power to the rear wheels and the parking brake is not engaged, unintended rollaway can occur, increasing the risk of a crash or injury.

The fix: Bmw will notify owners, and dealers will replace the constant-velocity joint and inspect the transfer case, replacing it if necessary, free of charge. The recall began May 22, 2020.