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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 the Battery
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      01-29-2019, 08:30 PM   #23
Bimmerroad
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Agreed higher amp

Higher amp is always desired for such high consumption vehicle

I would also recommend learning how to properly maintain your battery, I have lost batteries less than 2 years old, I often blamed the quality of the battery, eventually I learned I was the only one to be blamed.

Donít buy some cheap charger, it may do more harm than good and even overcharge your battery, I bought ctek 4.3 for $80, best investment ever. When using reconditioning mode, your bummer may turn off some stuff on standby, donít be alarmed, itís is normal as it may presume these items are draining the battery.

Well maintenance battery may go beyond its life expectancy
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      01-29-2019, 10:21 PM   #24
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Quote:
Originally Posted by Bimmerroad View Post
Higher amp is always desired for such high consumption vehicle

I would also recommend learning how to properly maintain your battery, I have lost batteries less than 2 years old, I often blamed the quality of the battery, eventually I learned I was the only one to be blamed.

Donít buy some cheap charger, it may do more harm than good and even overcharge your battery, I bought ctek 4.3 for $80, best investment ever. When using reconditioning mode, your bummer may turn off some stuff on standby, donít be alarmed, itís is normal as it may presume these items are draining the battery.

Well maintenance battery may go beyond its life expectancy
I read an article where an electrical engineer explained that if one puts a charger/maintainer on a battery once a month it will last a very, very, very long time; almost indefinitely.
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      01-31-2019, 09:39 AM   #25
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i just removed my battery because it needed a charge, forgot to leave the trunk open and doors are locked. is there anyway to get in the car? I tried to put the key in manually in the door, but it will not turn. it goes all the way in but doesn't turn. is it because it is electrical? how can i get into the car or the trunk?
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      01-31-2019, 12:45 PM   #26
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Looks like they removed the mechanical key override to the trunk on the F10 (my E90 had one hidden near the license plate). So - key in the driver's door to access the vehicle. You'll probably have to connect some kind of power to the cigarette lighter, or pop the hood and connect to the jumper posts. Then use the button at the driver's feet to open the trunk.

Hope no wires in the trunk are sitting so that they short to ground or it will get really interesting.

If you have one of the rear seats folded down you could pull the emergency interior anti-entrapment trunk release.

If the key isn't turning it may be seized, or you just need to turn harder.

PSA: Manual key override is something that everyone should familiarize themselves with and try out before they need it to make sure they know they have the right key (lock hasn't been changed) and what it feels like when it works.

Next time you want to charge the battery connect to the under hood terminals.
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      01-31-2019, 03:00 PM   #27
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Quote:
Originally Posted by michaelangg View Post
i just removed my battery because it needed a charge, forgot to leave the trunk open and doors are locked. is there anyway to get in the car? I tried to put the key in manually in the door, but it will not turn. it goes all the way in but doesn't turn. is it because it is electrical? how can i get into the car or the trunk?
Personally, I've never heard of the key not working in the deover's door. That's how I accessed my car when it was in the valet parking at the hotel we were at in New Orleans. I would try (assuming it's the correct key) rocking the key back and forth and maybe even squirting some dry-lube in the mechanism to breakup any gunk that may be there. I don't recall where you are, but when we lived in SLC I carried a lighter to heat up the key as the lock sometimes froze and there was no way I could turn the key. Sometimes it's cheaper to break a window and get in that way.

Quote:
Originally Posted by Surly73 View Post
Looks like they removed the mechanical key override to the trunk on the F10 (my E90 had one hidden near the license plate). So - key in the driver's door to access the vehicle. You'll probably have to connect some kind of power to the cigarette lighter, or pop the hood and connect to the jumper posts. Then use the button at the driver's feet to open the trunk.

Hope no wires in the trunk are sitting so that they short to ground or it will get really interesting.

If you have one of the rear seats folded down you could pull the emergency interior anti-entrapment trunk release.

If the key isn't turning it may be seized, or you just need to turn harder.

PSA: Manual key override is something that everyone should familiarize themselves with and try out before they need it to make sure they know they have the right key (lock hasn't been changed) and what it feels like when it works.

Next time you want to charge the battery connect to the under hood terminals.
All well and good, except he's locked out and has no access to those solutions.
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      02-01-2019, 06:52 AM   #28
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Quote:
Originally Posted by ezaircon4jc View Post
All well and good, except he's locked out and has no access to those solutions.
All of my solutions were assuming he figures out his key override issue which you've given more suggestions for. Hopefully he doesn't have the "wrong" mechanical key somehow (lock change in the history of the car, for instance).
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      02-01-2019, 07:44 AM   #29
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Quote:
Originally Posted by michaelangg View Post
i just removed my battery because it needed a charge, forgot to leave the trunk open and doors are locked. is there anyway to get in the car? I tried to put the key in manually in the door, but it will not turn. it goes all the way in but doesn't turn. is it because it is electrical? how can i get into the car or the trunk?
As already mentioned...something is wrong if you can't insert the mechanical key into the driver's exterior door lock cylinder and manually override the locking mechanism.

As suggested...try spraying some lubricant into the lock cylinder and give it good 5 minutes...then try again. I believe turning the key 90į counter clockwise is the manual UNLOCK position (go online and download an owners manual in PDF format).

And DO NOT use any of the 12 volt outlets to charge/power the car...BMW doesn't recommend this any longer since these cars have an IBS (intelligent battery sensor. ALWAYS use the dedicated jump start terminals in the engine bay.
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Last edited by Qsilver7; 02-01-2019 at 07:53 AM..
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      02-01-2019, 09:37 AM   #30
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Quote:
Originally Posted by Qsilver7 View Post

And DO NOT use any of the 12 volt outlets to charge/power the car...BMW doesn't recommend this any longer since these cars have an IBS (intelligent battery sensor. ALWAYS use the dedicated jump start terminals in the engine bay.
Just a note, since I suggested the lighter socket.

Qsilver is correct - connect chargers under hood only. My cig lighter suggestion was for the purpose of unlocking the trunk only. Connect, hit the button, disconnect And, that might not even work.

EDIT - I just went out and tested by key override. It's 90 degrees CCW to unlock. If the car is powered it still does all the electrical unlock, alarm disarm and window roll down if you hold it. The mechanical unlock would also happen in that 90 degrees from what I can feel. I'm not at the point where I'm going to disconnect my battery just to experiment though.

Last edited by Surly73; 02-01-2019 at 09:44 AM..
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      02-01-2019, 02:20 PM   #31
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got it unlocked. i had a locksmith open the car up since i had tried lubricating the key hole on the door and nothing would work. i gave it some power under the hood for a quick second to press the trunk button on the key fob. thank you all for helping!
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      02-02-2019, 12:05 AM   #32
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Glad you got it.
I have never really heard of this problem before though I'm not really
surprised as the physical key is rarely if ever used.
Out of curiosity did the locksmith go through the lock or pry the frame?
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      02-02-2019, 01:10 PM   #33
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It would be very informative to know how the OP got the car open...did the locksmith use the key blade and emergency/manual unlock procedure...or did they use another way in?

Quote:
Originally Posted by Surly73 View Post
I'm not at the point where I'm going to disconnect my battery just to experiment though.
I'm with you on that one.

But it does raise the issue how important it is to do an annual lock cylinder maintenance (at the least) since it is the ONLY way into the vehicle if the battery dies and the car is locked.

It would be frustrating to know that lubricating the lock cylinder and turning it 90į counter clock wise & clock wise to insure that the lock cylinder can go into the manual unlock & lock position BEFORE you actually need to use either of those positions....was known but one refused/neglected to do so. I've seen this scenario repeated across multiple BMW forums for decades...and it always seems to be frustrating to the owner caught in this situation.

I use a product called TRI-FLOW...it contains TEFLON which helps with any binding as well as dissipates moisture and the build up of dust/dirt/grime:

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      02-02-2019, 01:12 PM   #34
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Quote:
Originally Posted by michaelangg View Post
got it unlocked. i had a locksmith open the car up since i had tried lubricating the key hole on the door and nothing would work. i gave it some power under the hood for a quick second to press the trunk button on the key fob. thank you all for helping!
While you have it unlocked make sure the jey actually unlocks the door. Make sure both keys work.
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      02-04-2019, 10:48 AM   #35
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I went with higher Ah just make sure it fits in the brackets in the trunk
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