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2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums General 5-Series Sedan and Wagon (F10 / F11) Forum Replace battery
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      04-07-2014, 02:21 PM   #1
Breach
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Replace battery

I got home today turned off the engine and got a 'You may continue driving. Replace battery as soon as possible'. Car is exactly 3 years and 1 month old. Is it normal? Admittedly as it's my daily driver and the office is about 1.5 miles from home I don't charge it much during the week, but on weekends I do 100 miles or so. Twice per year I charge the battery on a CTEK charger .

I have a comprehensive maintenance contract which does include battery replacement, but I am afraid the dealership may try to pull the 'you didn't drive enough miles' trick. Any clue on how to respond if they do? Thanks.
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      04-07-2014, 02:29 PM   #2
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Does the maintenance contract have a min. miles driven per year requirement, if not, the dealer have no ground to stand on.
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      04-07-2014, 02:31 PM   #3
Breach
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No, but it mentions 'normal usage' which is not defined.
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      04-07-2014, 02:52 PM   #4
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Quote:
Originally Posted by Breach View Post
No, but it mentions 'normal usage' which is not defined.
I would not say anything to the dealer about your driving style unless they ask. 3 years for a battery on a car with such high electrical demand is not totally out of the oridinary.
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      04-08-2014, 06:40 AM   #5
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You should have a trickle charger installed.
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      04-08-2014, 04:38 PM   #6
Breach
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Yes, but I don't have a garage so it's a bit difficult. Anyhow, I went to the dealer today they read the FOB and said that I don't drive the car sufficiently (he said they see about 100 miles a week). The guy said that ideally I should charge it manually once a week. I have the car hooked up to the charger now. The dealer says the error will go away but a fault will be stored. I'm still hesitant - does 'Replace battery' mean it's just low on charge or does it mean it's dead? Because if it's dead I can charge it all I want it won't keep charge... I don't want to be stuck somewhere
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      04-08-2014, 04:55 PM   #7
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Its probably a low voltage warning, if the warning resets and doesn't come back, you will be fine. Might be time to replace the battery soon though.
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      04-08-2014, 08:20 PM   #8
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You could walk to work -- probably beneficial for both you and your car.
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      04-08-2014, 08:28 PM   #9
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Quote:
Originally Posted by Breach
I got home today turned off the engine and got a 'You may continue driving. Replace battery as soon as possible'. Car is exactly 3 years and 1 month old. Is it normal? Admittedly as it's my daily driver and the office is about 1.5 miles from home I don't charge it much during the week, but on weekends I do 100 miles or so. Twice per year I charge the battery on a CTEK charger .

I have a comprehensive maintenance contract which does include battery replacement, but I am afraid the dealership may try to pull the 'you didn't drive enough miles' trick. Any clue on how to respond if they do? Thanks.
Are you sure the message is not a reference to the key fob? Do you have comfort access?
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      04-09-2014, 02:14 AM   #10
Breach
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Yes, I have comfort access, but the FOB is nowhere near the car.

So I left the charger overnight (CTEK MXS 5.0, AGM mode). It was on trickle charge in the morning. Still the same message. I dug out my OBD reader and I get:

- 12.2-12.3 V with ignition on
- 13.8V with the engine idling - so the alternator is working

So I guess the battery is dying. Off to the dealer again...
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      04-09-2014, 09:37 AM   #11
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Comfort access wouldn't be relevant to key fob issues. All the F10 fobs are the same electrically.
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      04-15-2014, 01:22 PM   #12
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To update - battery replaced under maintenance.

Think they also updated the software in the car - the digital fuel consumption indicator has a slight 3D feel to it (orange line on the top), the nav voice sounds crisper and all my iDrive favorites and contacts are gone - also some settings were reset. Or is this normal during a battery replacement and I am just imagining things? ;-)

[Yep, definitely updated - I'm now on TX/MX 3.x on the combox. Good news I guess]

Last edited by Breach; 04-15-2014 at 06:46 PM..
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