2001 BMW X5 Q&A
2001 BMW X5 Question: I have a constant drain on my battery.
it is not the blower fan; most likely the blower resistor which is sometimes referred to as a final stage. it has access directly to the battery at all times, even with the key removed. your mechanic should know this if he bothered looking at the wiring diagram. there are other things that can cause a parasitic draw, but this is the most common one on all BMW's. - overbys