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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-15-2006, 08:40 PM   #1
BMWKing23
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Taking the BMW Key apart...

Does anyone have instruction on how to properly take apart my 2004 330ci coupe key? I want to clean the insides and replace the battery. Thanks in advance!!!
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Old 05-15-2006, 09:45 PM   #2
shortyb
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From what I understand, the battery is not replacable. It gets recharged each time its placed in the ignition. Never heard of one failing to recharge/hold a charge. But when it does, I suppose you'd have to replace the entire key. Big $$$.
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Old 05-15-2006, 10:52 PM   #3
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You can take the key apart my father just did mine. You can replace the batter. The battery only has 1,000 charge cycles(about) so it can die. I will ask him in the morning how it came apart. im pretty sure he just pried it apart bc its stuck together at the factory and basically plasitc welded together
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Old 05-16-2006, 09:53 AM   #4
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On the older keys there is a cover on the back that snaps on and there are 2 screws under it.

I'm not sure of the new ones.
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Old 05-16-2006, 01:53 PM   #5
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does this apply to a 2001 key as wel..my remote key hasnt been working consistantly, sometimes it does and sometimes it doesnt. Is this the key or something else?
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Old 05-16-2006, 02:24 PM   #6
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Quote:
Originally Posted by wzorba
does this apply to a 2001 key as wel..my remote key hasnt been working consistantly, sometimes it does and sometimes it doesnt. Is this the key or something else?
try replacing the battery, i had the same issue in my 328. Then again, i've got a different key as you...
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Old 05-16-2006, 02:53 PM   #7
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I'd be interested in knowing how, one key already went down. I've been told the same thing at the stealership that once a key is dead, well its like $125-150 to get another one. Damm. On the flip side at least the key still starts the car, consider it an expensive valet key.
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Old 05-16-2006, 04:05 PM   #8
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Lightbulb To Open all BMW keys 1999 to present...

It really is so simple to open the keys I am supprised that no one has figured it out yet.







Just place the old key on a firm non marking surface. then find something very very heavy (a hammer works best ) and strike the key. Several hits may be necessary and should be repeated until the two halfs come appart or you have more than six pieces that don't look like they will go back together with glue.

How is that for a DIY??
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Old 05-16-2006, 04:11 PM   #9
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Quote:
Originally Posted by ck21084
It really is so simple to open the keys I am supprised that no one has figured it out yet.
Just place the old key on a firm non marking surface. then find something very very heavy (a hammer works best ) and strike the key. Several hits may be necessary and should be repeated until the two halfs come appart or you have more than six pieces that don't look like they will go back together with glue.

How is that for a DIY??


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Old 05-16-2006, 04:42 PM   #10
bimmer jon
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i did this. i'm not sure when BMW started using the newer keys but I read that they are ultrasonically sealed and the parts inside are unservicable. i can verify this as I bought a dummy key to experiement with. On 2002 and below, the keys had decals on it that rubbed away, on 2003+ they have raised plastic for unlock, and trunk release.

i took a razor blade and just kept going back and forth until i got the cap off. Its really difficult only because you have to take your time. if the razor blade goes to far into the key, its garunteed to knock out the resistors and other electronic stuff underneath the cover.
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Old 05-16-2006, 05:09 PM   #11
Dev
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Quote:
Originally Posted by ck21084
It really is so simple to open the keys I am supprised that no one has figured it out yet.







Just place the old key on a firm non marking surface. then find something very very heavy (a hammer works best ) and strike the key. Several hits may be necessary and should be repeated until the two halfs come appart or you have more than six pieces that don't look like they will go back together with glue.

How is that for a DIY??
Oh great. I just followed the directions of this DIY.
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Old 02-17-2007, 11:35 PM   #12
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Quote:
Originally Posted by ck21084 View Post
It really is so simple to open the keys I am supprised that no one has figured it out yet.







Just place the old key on a firm non marking surface. then find something very very heavy (a hammer works best ) and strike the key. Several hits may be necessary and should be repeated until the two halfs come appart or you have more than six pieces that don't look like they will go back together with glue.

How is that for a DIY??
Thanks for the great DIY! I'll try it as soon as I get home.
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