Question about 2005 BMW X5

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BMW 2002 X5 Battery Drain

I purchased a used 2002 BMW X5, for a few months the car worked fine. After that time that's all she wrote, the battery kept having a drain. I've had the mechanic test or try to fix it a number of occasion no success. Actually it will be fine for a short period and right back to a drained battery. The battery use to be on a a timer I will say because every few days it will drain to where another jump. I am trying to make a long story short but I really need HELP!

Posted by Anonymous on

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I am having the same problem with my 2002 X5. There is a motor or fan running behind the AC control panel on the dash and if I pull fuse 48 it stops and the battery doesn't drain. Still looking for the cause and solution so that I don't have to keep pulling and installin fuse 48. BMW garage suggested that it was the Final Stage Blower Resistor. I replaced this and no change. I hope someone has an answer that will help us both.

Posted on Jul 20, 2013

  • George Thompson Jul 20, 2013


    I am having the same problem with my 2002 X5. There is a motor or fan running behind the AC control panel on the dash and if I pull fuse 48 it stops and the battery doesn't drain. Still looking for the cause and solution so that I don't have to keep pulling and installin fuse 48. BMW garage suggested that it was the Final Stage Blower Resistor. I replaced this and no change. I hope someone has an answer that will help us both.

  • Dawne Mckenzie
    Dawne Mckenzie Mar 05, 2017

    Yes that's correct my 2002 model had same problem the heater/motor kept running you could hear it when the car was turned off. Solved that problem now few weeks later my wipers and alarm have suddenly stopped working.... always something!!!!!!

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Posted on Jan 02, 2017

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SOURCE: BMW X5 Battery Drain.

hello theringbar, I would recommend checking the a/c blower resistor. it is an electronic final stage and can kill the battery overnight. the final stage is located on the passenger side at the back of the a/c heater box.

Posted on Mar 26, 2009

  • 48 Answers

SOURCE: Battery on BMW 740i keeps dieing

you need to disconnect one side of the battery, put one lead from an ampmeter on the battery post you have disconnected and the other ampmeter lead on the cable you took off the battery. with nothing turned on on the car , all doors closed the reading on the ampmeter should be no higher than 0.17 amp, if it reads a lot hgher go to the fusebox and remove one by one all the permanent supply fuses looking at the reading every time until you find the circuit that is causing the high reading, this will be the drain. alot of the time it can be central locking system playing up, boot light, glove box light not switching off, stereo wired wrong. hope this helps.

Posted on Apr 30, 2009

  • 1 Answer

SOURCE: 2003 BMW X5 fan runs after engine is off, drains battery

if you mean the interior fan
replace fan control resistor driver side footwell in climate housing

Posted on May 27, 2009

  • 119 Answers

SOURCE: 2005 bmx x5 battery drain

You need to check for any lighting left on overnight if not try to fully recharge your battery and perform a load test on it to see if it will hold the charge if so possible drainage off of interior lighting switches or alarm possible

Posted on Jan 19, 2010

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