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  #1  
Old 11-05-2013, 10:59 AM
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Location: Connecticut
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Pending Battery Failure or???

The Vehicle:
  • 2008 X5 3.0i
  • 56K miles
  • Original battery as far as I know. I certainly have not replaced it in the 27 months that I have owned it and the service history for the first 30K (a lease by someone else) didn't mention anything about the battery.
Symptoms:
  • MPG average reads 99 MPG (Wouldn't that be nice if it were true?)
  • Radio periodically doesn't work. The I-drive screen appears to be fully functional but no sound. Than after driving for a period of time the sound just miraculously reappears. This occurred yesterday morning (per my wife's description) after a cold start (it was in the high 20 degree F range here in CT)
  • Aux. connection doesn't detect I-Pod. Again, this occurred yesterday morning.
I have not checked the voltage from the battery but my initial thoughts of course are with that being the issue. With an in-service date of 8/27/08 this battery has to be on its last leg. I have ready so much about battery drain etc. on the E70's and I have NEVER had a problem. Perhaps I am answering my own question with this thread but was wondering if there were any other thoughts. I hope its not the radio itself?
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Current BMW's:
2013 E70 X5 xDrive35i Premium (mine)
2014 F25 X3 xDrive28i (hers)
Past BMW's:
2001 E46 325i
2001 E46 330ci
2003 E39 525i
2006 E53 X5 3.0i
2008 E70 X5 3.0i
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  #2  
Old 11-05-2013, 03:04 PM
ard ard is offline
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Id look at the nav/electronics area and make sure you dont have the dreaded "sun roof drain clog that floods the nav and causes $$$damage".....
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Old 11-05-2013, 07:43 PM
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Other than the reported random electronic issues, I did see the battery icon pop up on my dash (not idrive) once. This was a few months ago, also an '08. It happened when I turned the engine off but left the radio on - which is not something I do often. I was just wait for someone to come back. It turned off a lot sooner than it normally does (15-20mins) - this time it was like 5min. So I push the start button again to turn it back on and shortly it went off again but with a battery icon. Maybe you should try that simple test. The battery icon is unmistakable.
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'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

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  #4  
Old 11-08-2013, 08:42 PM
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Have you seen a message "increased battery discharge" on the center screen?
The day I was it on my x5, that evening the car died (failed alternator @ 90k miles).

Is the car diving sluggish, or less responsively then you may think you are use to?
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