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  1. E39 (1997 - 2003)
    Really stumped on this one. The aux fan only works when the A/C is on. I replaced the temp sensor on the lower radiator hose and the aux fan sensor on the shroud. I tested the fan through INPA with low/mid/high speed and it works so I know the fan is still good. I also checked the two big...
  2. E39 (1997 - 2003)
    Bear with me, I know there is a lot of information on this site relating to my question. In fact there is too much. So I am thoroughly confused... I have a 2000 528i with 100K miles. I had to replace the throttle body because of what sounds to be a very common problem that is the car frequently...
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