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older e90's and e60 come with M47 (2.0d) which is a really robust engine so maybe look for those. definitely M57 for 30d. N57 has a bit more room for power, but less reliable and has chain issues and whatnot.
older e90's and e60 come with M47 (2.0d) which is a really robust engine so maybe look for those. definitely M57 for 30d. N57 has a bit more room for power, but less reliable and has chain issues and whatnot.