NHTSA Complaint #11555126 — 2019 BMW M5

I actively participate in online F90 forums, and it seems like the coolant expansion tank seems to fail for almost all owners (both pre-LCI and LCI). In many cases, it also damages critical engine components underneath the tank and results in expensive repairs. Indeed, because BMW has failed to address this problem, the afternmarket already offers an aluminum billet coolant expansion tank, as well as a coolant expansion catch can that reroutes escaping coolant so as not to damage components located beneath the tank. While interacting with other owners, I learned that these failures continue to fail (including the recently revised part number) and there are several owners that needed the tank replaced multiple times (an owner I interacted with on bimmerpost today is on tank #8). Can you please advise as to BMW’s intent to properly and permanently fix this issue? It's a major design flaw impacting all F90 M5s (ticking time bomb), and I am very surprised to see no official recall and replacement part that properly fixes this critical issue. This issue is not about an individual vehicle, but a manufacturing defect that impacts all F90 M5s. Please share this message with the team responsible for supporting the M5 product and request that they respond on how they are planning to permanently fix this issue. Please understand that this is a serious concern shared by dozens of M5 owners I am in communication with. Waiting for the failure to happen on a given F90 M5 and going to a service center is NOT a viable option since it may already be too late and the damage already done. My car has documentation that proves the coolant expansion tank has failed previously at around 12K miles and affected other parts such as injectors. After less than two weeks of owning the car, the coolant tank has failed again as evidenced by coolant escaping at the tank seam. The car now has slightly over 14K miles.