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Old 25th December 2011, 08:14   #1
JonnybravoM3
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Increased Battery Discharge

Hey all - firstly I would like to start by wishing you all and your families a very Merry Christmas!

Well, did a forum search and noticed the last thread on this topic was back in '09 and the one before that was in '06!

Well got this warning sign this morning when I started the car - noticed some symptoms that the other members had spoken about in their older threads also - time and date had reset; CD changer sounded like it was shuffling around my CDs. Sign stayed on all the way to the office - turned off the car for a few mins then turned her back on again and the warning had gone.

Wondering if anyone had encountered this issue and what the cause was? I emailed my service guy at the dealers and told him about it and attached the pic I took (attached here) since whenever the car goes to the dealers for some reason all error lights suddenly disappear lol and so the dealer tells you that they don't see any problems. If anyone has encountered this, what ended up being the problem? The other threads didn't really reveal what the dealer's diagnosis was. Could it just be a matter of battery needing a recharge? Or replaced with a new one? Maybe loose wiring or alternator? Either way - should this be covered under warranty? Ive got warranty valid for another year.

Car's going in on 28th for a service so they can look into it during that time - perfect as I'll be out of town.

Happy Holidays all.
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Old 25th December 2011, 10:27   #2
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I have a post here about that message somewhere. Kindly do a search.

I will summarize for you.

If your car is completely stock (no electrical mods) then its possible that your battery simply needs recharging.
Buy a battery charger and charge your battery in slow mode over night until its fully charged.

When you are not using your beast, attach a Battery Tender.

If your car is about 5 years old, it is possible that the battery is dying and needs replacing.

It is also possible that your alternator is going bad and not providing enough power to charge your battery as you drive.

If your car is still under warranty - then just take it to your dealer and let them figure it out and fix the problem.
Nice thing about having a warranty!

Hope that helps.

Dan
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Old 25th December 2011, 13:46   #3
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Hey bro , how are you doing ??
it's ok don't worry just change the battery , happened to my car before i sell it , i went to the $tealer and after they check the car it apeared that the problem was the battery , i only paid 90 KD ( $320USD ) Good luck .
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Old 25th December 2011, 17:11   #4
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I had an issue with my comfort access handles that basically made the car act as though it was in silent alarm mode all the time or some such nonsense. Anyway, it was causing my battery to drain and me to get this message. Just letting you know because this can be something other than the alternator or the battery (the dead battery may be a symptom of the problem, not the actual problem). I think my situation was rare though. Anyways, the dealer replaced whatever needed to be replaced and gave me a new battery as well, all under warranty.

Last edited by eddiejb; 25th December 2011 at 17:12.
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Old 25th December 2011, 19:55   #5
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Thanks guys - Dan always the first one to the rescue lol. Interesting though it never came back again since this morning - left work and drove to lunch and back from lunch and out in the evening - no issues lol. Could it have ANYTHING at all to do with my ipod having been left plugged into the AUX for the past 3 days while the car wasn't used at all? I doubt it as the aux doesnt have power does it? Thats the only thing ive done differently as Ive left the car before for 3 weeks with the aux cable detached and had no issues. Just a thought. Will see what the stealers have to say.

Q8 where are u bro we miss u over here in Bahrain you don't visit us anymore! Was so sad to read that you sold your beast bas inshallah will see you in something very special very soon.
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Old 20th November 2012, 03:20   #6
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I just purchased an M5 and I have the same problem. I think similar to the comfort access issue. I purchased an extended warranty but will see if the dealer i bought the car from will cover it even though they are out of state. Not ready to be ripped by the dealer already.
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Old 26th November 2012, 12:54   #7
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+ 1 to Dan's post.

In addition, it is possible that one of the modules like the comfort access is not sleeping when you lock the car.
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Old 26th November 2012, 20:38   #8
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Its been nearly 1 year for me now since I started this thread and never got the warning again (battery was not changed or manually recharged either).
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Old 26th November 2012, 22:59   #9
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My warning went away last week and hasnt come back.
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Old 8th January 2013, 02:35   #10
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Well I just brought this thread back from the dead after doing the search. I didn't see an answer to my problem so maybe someone can help me out.

Yesterday, it was raining and dark at about 3:30pm for me so I manually flipped my headlights on. Got home and was in a rush to get inside and completely forgot to turn off the headlights. I think it was about 8:00pm when a neighbor so kindly told me that my lights were still on.

Went outside and started the car real quick to make sure the battery was good. Didn't check or notice anything different because all I did was start it.

Today, I had noticed that the time/date was reset. The trip odometer, MLS, MPG were all reset as well. The MPG did go from like 4.1 to 8.1 on my way home but it usually reads about 12.7/8 when I bought it from the previous owner. I also did get the Increased Batt Discharge light for my trip to the gym. Two hours afterwards on my way home, that warning had gone. Nothing was reset, but not back to normal either.

Is this something I need to go to the dealer about to get it to read normally again? New battery and reset the computer onboard from the dealership?

I'll also add that my '06 is about 4 months old to me so very new to this community. Any help is much appreciated.
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