BMW G11/G12 Owners - Avoid This Problem While Still Under Warranty

I drive a 2016 BMW 740i (G12) with a May 2016 build date. The expansion coolant tank developed a crack and the auxiliary coolant pump failed. The very first symptom of a problem was low coolant warnings after warm starts, followed by sporadic then no interior heat. The problems occurred while the vehicle was under warranty but the problems were not identified until a cooling system pressure test was performed a few miles out of warranty when error messages displayed after cold starts.