I have a 2020 M50d and have had zero issues with it. From what I know the engine itself is pretty bulletproof - it and its derivatives are used all over the BMW range. I do know that BMW were struggling with emissions for the Quad turbo version... maybe that's the reason they decided to drop it... that and diminishing demand. having said all that its a fabulous engine in the G05.
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2020 M50d - Arctic Gray with Ivory White/Black Vernasca
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