BMW X5 Battery Drain.

remove the reinforcement plate under the engine. 4 x 17mm nuts. You will need to hold the back side of each bolt with a box end wrench or it will just spin. Then you will see the oil pan. Remove the 10mm nuts and the pan will come off. . (Drain the oil first!). When you replace the reinforcement plate, use new bolts. They are one-time use. (Really).

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.

If you have a drain on your battery , it would not take 18 months for the battery to go dead . What do you mean The battery gauge in the dash shows only about 1/2 power, When ? When the vehicle is running ? Not charging ! The battery gauge as you call it has nothing to do with the Battery . That's showing how much the charging system is putting .The volt's indicator is controlled by the PCM - engine computer . With the engine running should show 14.1 volts .if your only seeing 7 the charging system isn't working. The alternator is controlled by the PCM as well ! Have it check by a GM dealer .

If the key is in off position it won't drain battery.
You may have battery draw in that vehicle , or the battery itself is going out.(BMW batteries are good for 4-5 years)
Both cases needs to be checked by workshop , cause BMW very sensetive to the voltage drop. When you disconnect battery you may need to perform some settings adaptation after you replace it or connect it back.
New BMW requared to reset computer even after brake job and battery replacement.

i had the same problem on one of my cars it was the fan control module. replace that and it will fix the problem.

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

My car has been sitting since May and i would start my BMW every once and awhile but the last time I started it was around July 11th and a week later my battery was died and now today I went to unlock my BMW x5 car door and it wont unlock. Do I need to charge my battery?

CHECK THAT YOU HAVE AGOOD POWER FEED TO ALTERNATOR AND A VERY GOOD EARH HAD ONE A FEW MONTHS AGO IN SAME FAULT WAS APOOR EARTH TO ALTERNATOR.

I have a 2000 x5 4.4 my problem is i can turn the ingintion switch wait about 3 to 4 second and the SUV will start. Or sometime I have to turn the inginiton switch all the way off and back on again before it start. I have had the ingintion replaced about 9 months ago.

I had the same problem with the suspension on an o2 X5 Sport,it was the stabiliser pump in the rear,Range rover is the same pump and is cheaper than the BMW part,they also do an exchange unit.