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540i air flow sensor

  1. E34 (1989 - 1995)
    Hi All, So recently bought this 1994 540i with 214K miles on it. Body in good condition, engine running pretty rough on idle -better with the AC on which I thought was odd. Kind of like a souped up chevy. Fine when driving though. So, looked at lots of posts (btw, fixed the twisty drivers seat...