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2022 m550i with 12k miles here.
Had a "low coolant" warning come on just before my 1st service (around 6k miles). Dealer said they checked the system and no leaks, topped off the coolant.
Had another "low coolant" warning come on just before my 2nd service (right around 12k miles) this time the Dealer said the coolant tank had cracked and they replaced it under warranty.
Given the long time between the vehicle's initial "in service date" and 1st leak (6k miles, almost 1 year) and between 1st service and 2nd leak (another 6k miles and almost 1 more year) I'm not in a position to say whether or not replacing the coolant tank has addressed the issue, but I should be able to tell you in a year or so.
I'm hoping it was a cracked coolant tank, because if the engine burns coolant as a matter of course, that's just piss poor design or quality control, which will definitely impact whether or not I buy another BMW, especially since BMW has been "working on improving" the N63 engine ever since they put it into production.
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