Issue:
On certain motorcycles, a sudden difference in speed between the engine and rear wheel could damage the gearbox input shaft or cause it to break. If this happens, the rear wheel could lock up while riding.
Note: This type of sudden change in rear wheel speed is uncommon, but may happen in an off-road situation where a spinning rear wheel slows suddenly while landing after a jump.

Safety Risk:
A rear wheel that locks suddenly could cause a loss of control and increase the risk of a crash.

Corrective Actions:
BMW Motorrad will contact owners by mail and instruct you to bring your motorcycle to a dealership to update the engine management software.