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  1. #1
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    N20 engine turbo question

    The F30 328i parts diagram on realoem.com shows a turbocharger part # 11657642469 on the N20 engine FROM 7/12. Was there a problem with the previous turbo before 7/12 that necessitated a design change in 7/12? I'm thinking about buying a 2013 Z4 sDrive28i with the N20 engine which currently is equipped with a turbo part # 11657635803 that apparently will be replaced with the F30 328i turbo part # 11657642469 in 3/13, and I don't want the old turbo if there was a problem with it on these N20 engines. The F10 528i shows turbo part # 11657635803 UP TO 7/13, so it looks like the new turbo part # 11657642469 is being phased in gradually on the 3 series, Z series and 5 series in 7/12, 3/13, and 7/13 respectively. Does anyone know anything about the turbochargers in this N20 engine and why they are modifying their design?
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    N20 turbo

    I am a master BMW tech, and we have not put a wrench on an N20 engine. As for the changes, BMW is constantly tweaking their products, and while there may be differences in the turbochargers, I am not aware of any issues whatsoever with the N20 turbochargers.
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    Thanks for sharing that experience. It's very reassuring to know that the N20 engine hasn't had any issues so far.
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    older n20s had vacuum wastegate and they switched to electric wastegates on later engines
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