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These are brushed motors -- "This raises the question of how long a BMW EV like the i4 or iX will last before it needs a potentially major brush replacement service or a new electric motor and/or battery pack." All well and good so long as brush replacement and brush wear particulate cleaning is Designed In! The article makes no mention, but that is essential.
great comments on both my posts. BMW claims the rushers are protected from brush particulates. We'll see.