Had mine go the other month, and my signs were the fan not functioning at all! (left my poor wife with "manual defrost!" (translated, wipe the window with a napkin or coat sleeve every 3 minutes!! )
its a really simple fix if youre a double jointed mechanical type!
still its an easy repair, and if you get a part from a wrecker, it can be quite economical! (paid $20 for one!)
best of luck!

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2003 X5 3.0i (02/2003) sport package, Sapphire black metallic / Black Dakota Sport seats. compass mirror retrofit, trailer hitch retrofit, Prodigy P2 trailer brake controller installed, PDC retrofit, Lumbar support retrofit. heated rear seats retrofitted. Running boards retrofitted and subwoofer install in progress. 4.8is Brakes installed front and back. Bluetooth TCU installed, Rear Fog lights installed. Retrofitted reclining rear seat backs.