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BMW X5 Maintenance and Repair

598 messages,  Last post on Dec 02, 2009 at 8:06 PM

You are in the BMW X3 & X5 Forum. Your Hosts are steve_ & tidester

What is this discussion about? BMW X5, Auto Body, Engine, Suspension, SUV


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#547 of 598
Re: Engine Problems? Please help [lion2000] by xm0399
Apr 04, 2009 (2:30 pm)
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Replying to: lion2000 (Sep 16, 2008 1:17 pm)

Hi,
 
I have the same issue when I accidentally refuel my X5 with regular unleaded and the engine running rough. So from that day, I am making sure that when I fill-up, it's the right gas. Also, don't forget to install the gas tank cap before to start the engine.
#548 of 598
X5 4.4 Battery excessive drain by lion2000
Apr 18, 2009 (2:02 pm)
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Since I changed my work, I do not drive my 2001 X5 every day (once/3-4 days), the battery died. I replaced the original battery. 2 months later, the new battery died. Then I got my third battery, it then died in 1 month. What appears to me is the following:
 
1. The brand new battery is fully charged, and it takes a while to drain all the charge. So the first dying event occurs after 1 month.
2. Since I do not drive much, even once 3-4 days, the battery can not be charged to full each time after driving.
3. I measured the battery current drain (with all interior lights off and engine shut off). First minute turning off the engine, it is ~2 Amps. After 1 minute and on, it is 1.2 Amps. At 1.2 A of standby current, it may be too much for the battery.
 
My question is that anyone knows is 1.2A current too much as standby current?
 
Thanks, //leo
#549 of 598
Re: X5 4.4 Battery excessive drain [lion2000] by tidester HOST
Apr 19, 2009 (1:11 am)
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Replying to: lion2000 (Apr 18, 2009 2:02 pm)

Over a four day period, you're using up 1.2×96 = 115.2 amp-hours. Normal fully-charged car batteries have a capacity of about 100 amp-hours so, yes, that drain rate does seem excessive.
 
tidester, host
SUVs and Smart Shopper
#550 of 598
Re: X5 4.4 Battery excessive drain [lion2000] by Mr_Shiftright HOST
Apr 19, 2009 (7:37 am)
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Replying to: lion2000 (Apr 18, 2009 2:02 pm)

My understanding is that anything over 400 milliamps is going to cause trouble.
#551 of 598
Re: X5 4.4 Battery excessive drain [tidester] by lion2000
Apr 19, 2009 (9:28 pm)
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Replying to: tidester (Apr 19, 2009 1:11 am)

I checked another bulletin board, X5world, and found some people claim the sleep current should be 0.038 A. The car IS going into the sleep mode, but something else is draining too much current. Some suggests to pull out fuse to see which circuit is causing the excessive drain. I will do so and post the results later.
#552 of 598
Re: X5 4.4 Battery excessive drain [lion2000] by tidester HOST
Apr 19, 2009 (9:54 pm)
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Replying to: lion2000 (Apr 19, 2009 9:28 pm)

Do let us know what you find out!
 
tidester, host
SUVs and Smart Shopper
#553 of 598
Re: X5 4.4 Battery excessive drain [tidester] by lion2000
Apr 24, 2009 (11:44 pm)
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Replying to: tidester (Apr 19, 2009 9:54 pm)

My garage was hot for a few days. Today it was cool so the work continued.....
 
I pulled out fuse #27 that shuts the interior lights off. I placed a meter between battery cable and the body chassis. After starting the car and let the battery to be charged for 10 minutes, I shut the engine off. I disconnected the battery connection to the body with the Amp meter intact. I then shut all doors. The current went down to 1.05A. After a minute, it went down to 0.52A. After 15 minutes, it went down to between 0.05-0.07A (flutuates) in sleep mode.
 
I then retored fuse #27, turn ignition key to 1, 2. then off. Shut all doors. The current behaves the same way.
 
Mysteriously, I do not see 1A sleep current anymore. All I did was (accidentally) disconnect and reconnect battery multiple times. All I can conclude is that something is not reliable, this problem may appear again someday.
 
//leo
#554 of 598
Re: X5 4.4 Battery excessive drain [lion2000] by tidester HOST
Apr 25, 2009 (12:52 am)
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Replying to: lion2000 (Apr 24, 2009 11:44 pm)

This is just a thought, but I suspect there is some kind of circuitry (electronic control module/light control module) that is failing to put the circuitry into sleep mode. The fix might be as "simple" as upgrading software or replacing the unit in question. Disconnecting the battery may have jolted the the control unit back into proper operation but if it happened once it can happen again.
 
tidester, host
SUVs and Smart Shopper
#555 of 598
Check engine light keeps coming on by brohun
May 08, 2009 (3:00 pm)
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I have a 2007 X5 3.0. My check engine light came on at near 50k miles. The dealer 1st said it was a loose gas cap! the truck has been at the dealer 8 times with no fix yet. They replaced the gas cap, reprogramed the computer a couple of times and now BMW wants to test the gas tank and possible replace! I'm told that there are several other vehicles at my dealer with the same problem! Has anyone else had this problem?? Is there a fix??
#556 of 598
Re: Check engine light keeps coming on [brohun] by lion2000
May 09, 2009 (7:08 am)
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Replying to: brohun (May 08, 2009 3:00 pm)

My 2001 X5 4.4 light would come on momentarily for no reason. Dealer said while filling the gas, I should have radio turned off. It does not sound intuitive! Dealer also changed the gas cap, the light still turns on momentarily.
 
While gas price was high a year ago, I started to use regular unleaded 87 gas. The light stays on, until I changed to premium gas 91. I wonder if the light turns on because the octane level was low in the gas?

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