3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
There is little control unit ( size of a match box) in fan itself that might be broken ( my car did). The sympthons were similar , fan did not stop without unpluggin it. You can't buy just control unit but you have to buy whole new fan if go you go to BMW dealer.
I see you already made an appointment. I would find the fuse and remove it. You can still drive without the auxilary fan. If you idle for very long and the temperature outside is high, then you may overheat a little. Get it fixed quickly bya ll means, whether you DIY or take it in.
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