Battery location - how do you get to it?

Tiny
DOCTORJS5525
  • MEMBER
  • 2009 BMW 750LI
  • 37,500 MILES
Battery discharges after every stop. Gets driven at highway speeds over 30 mins. Twice daily. Tried charging and still won't stay charged. Want to change battery to new one, but can't find it.
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Saturday, December 10th, 2011 AT 8:40 PM

14 Replies

Tiny
RIVERMIKERAT
  • MEMBER
Hello,

The battery is located in the trunk ij th center well here is a guide to help walk you through the steps and the battery location in the diagrams below.

https://www.2carpros.com/articles/how-to-replace-a-car-battery

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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+3
Saturday, December 10th, 2011 AT 8:44 PM
Tiny
LYNDON GORDON
  • MEMBER
  • 2006 BMW 750LI
  • 62,463 MILES
What is the step by step procedure to change the battery in this model and can I hook up a maintenance charger to this model.
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
Best use another battery and hook it up parallel to the existing one than remove it otherwise you gonna encounter a problem and the computer has to under a relearning process
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
LWMJR1
  • MEMBER
You can use another battery if you want more problems, this model car the dealers are converting them to agm batteries and need to reprogram them to a different charging rate. If you use the same battery you still need to register the battery change in the cars computer via a professional scan tool so it can be charged properly
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
DR. HAGERTY
  • MEMBER
62k aint a lot of miles, dont drive it too much mate?
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
RICHARD2009
  • MEMBER
  • 2006 BMW 750LI
2006 BMW 750Li

How important is it to have my new battery registered with the car computer?
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
BIG_JAY
  • MEMBER
What do you mean registered? Is there a message in the display center in your car?
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
RICHARD2009
  • MEMBER
No message, the dealer told me it should be registered to make sure it did not get over charged.
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
BIG_JAY
  • MEMBER
You alternator is only gonna charge what the computer tells it to charge. It will make no diff on what battery is in the car. As long as you put the correct vented battery back in you wont have any problems.
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
DR. HAGERTY
  • MEMBER
It actually makes a great deal of difference when charging rate algorithms are selected and it is a $300 glass mat battery that can have it lifespan curtailed by not registering the battery upon replacement. Trust me on this, I didn't believe it either, until BMW sent me to E-65 school.
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
ALBERTWATSON
  • MEMBER
  • 2010 BMW 750LI
  • 7.5L
  • V8
  • TURBO
  • AWD
  • AUTOMATIC
  • 70,000 MILES
Computer screen tells me battery is discharging when car is stopped plus to charge the battery. The battery is showing 920ccamps when I check it, I am stummped.
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
How are you getting 920 cca? That requires a professional load tester, but it's a test for the capacity of the battery. A discharging battery is due to a failed charging system. To verify that you need to measure the battery voltage while the engine is running. It must be between 13.75 to 14.75 volts. If it is low or is staying near 12.6 volts, the generator is not recharging the battery while driving.
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Thursday, February 7th, 2019 AT 6:39 PM (Merged)
Tiny
ESPO 1
  • MEMBER
  • 2006 BMW 750LI
  • 45,000 MILES
I have been experiencing crackling noises over the speakers and GPS and radio cutting in and out. Also the idrive toggle will not have the same resistance when I go to use it right after starting the car. After driving all systems seem to come back. Battery was tested and voltage was 10. My mechanic (not a BMW tech) says the battery isn't holding a charge and needs to be replaced because of age. Can the problem be anything else like a short or something?
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Thursday, February 7th, 2019 AT 6:40 PM (Merged)
Tiny
MHPAUTOS
  • EXPERT
The battery will need replacing, check all earths and the alternator output, the battery does not have to be a BMW genuine unit, just as long as it is the correct size for your car.
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Thursday, February 7th, 2019 AT 6:40 PM (Merged)

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