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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 05-06-2013, 08:56 AM
soldierboy05 soldierboy05 is offline
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changing my battery

My battery just died, and the dealership is quoting me at $350 with battery and install. It took me 5 minutes to take the sucker out and found batteries at a more reasonable price at AutoZone. The dealership said they have to sync the battery to the computer. Does this have to be done at a BMW dealership? They also said the sync would cost a $100 alone. Someone please shoot some advice my way. Thanks!!
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  #2  
Old 05-06-2013, 09:21 AM
jburke4689 jburke4689 is offline
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"syncing" is actually called "registering" and is telling the computer that you have a new battery and what the capacity of the battery is. If you don't register the battery, the alternator will charge at the rate it was charging your old battery and may shorten the battery life. Do a search, you will find a million opinions on this. Registering is not required but it may increase the life of your new battery.
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  #3  
Old 05-06-2013, 09:40 AM
soldierboy05 soldierboy05 is offline
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O, ok. Thanks for the heads up. I am new to the post world. I will look into it a little more. Do you happen to know if I could purchase a battery now and register it at a later time?
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  #4  
Old 05-06-2013, 09:51 AM
jburke4689 jburke4689 is offline
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Quote:
Originally Posted by soldierboy05 View Post
O, ok. Thanks for the heads up. I am new to the post world. I will look into it a little more. Do you happen to know if I could purchase a battery now and register it at a later time?
If you are going to do it, you should do it soon. It really only works on a "new" battery. Check around for an independent BMW service center. They will be able to register it for you and it will be much cheaper than $100.
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  #5  
Old 05-07-2013, 07:35 PM
Drewsome Drewsome is offline
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It never ceases to amaze me how every simple repair or service on a BMW turns into a complex, expensive proposition. I guess that's what helps keeps this forum so active!
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  #6  
Old 05-08-2013, 01:41 AM
sptt144 sptt144 is offline
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Just don't do it and go for it without registering. Report back to us in a couple months as to how it is going. Bet it will be just fine!
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  #7  
Old 05-08-2013, 03:31 AM
hondo402000 hondo402000 is online now
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thats what I was going to say, you be the test subject
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  #8  
Old 05-08-2013, 02:15 PM
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fun2drive fun2drive is offline
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No one knows what improvement this provides but if you look at how BMW did this it isn't simple since the DME gets input from the IBS and others to use the correct algorithm.
If you go over to the E90 forum and look under the first main E90-91-92-93 thread you can find an individual named smooth that provides free software to register your own battery if you buy an OBDII cable that is spelled out in his thread. All you need is a laptop and download his software follow the instructions- done. I have used it and it works just fine.
If you invest in the cable his software reads the codes too but if you want to clear them you need to pay a small fee to him for the access.

It is impossible to say what improvement is had using BMWs requirement. If you get a battery for a 100 bucks and don't register it and it lasts 3 years you are money way ahead from buying it from the dealer and paying registration costs which many report are 400-500 bucks.

I don't think it is going to hurt any battery life if you are a couple weeks away from getting this done. If the BMW charging system was so good why did your battery die? See my point how much does it really help? No one knows my guess is maybe 15% but that is a pure guess...
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  #9  
Old 05-08-2013, 02:56 PM
gcreese gcreese is offline
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This is one of those, "It's unclear what the risks are." Some people replace the battery on their own, don't register it, save money, and do fine. However, there's one fellow who replaced his own battery and it later blew up. See: http://www.e90post.com/forums/showthread.php?t=468750. Me? I'd pay the BMW fee to avoid my trunk blowing up and my car dying in the middle of a busy street. But that's me. It would be nice if BMW would clearly state why they require battery registration.
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  #10  
Old 05-23-2013, 12:32 PM
soldierboy05 soldierboy05 is offline
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Its been a week and so fare so good. I will try and take the hour drive to the dealership this four day weekend. Thanks guys.
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  #11  
Old 05-23-2013, 12:47 PM
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Vanos4:12PM Vanos4:12PM is offline
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Cool, -keep us posted if you can in the future.
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  #12  
Old 05-23-2013, 12:47 PM
RBinDC RBinDC is offline
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Quote:
Originally Posted by soldierboy05 View Post
Its been a week and so fare so good.
Isn't that what the guy said as he passed the 50th floor on his way down on the outside of the building?

Seriously, get it registered.
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  #13  
Old 05-23-2013, 12:51 PM
Watchme Watchme is offline
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Originally Posted by RBinDC View Post
Isn't that what the guy said as he passed the 50th floor on his way down on the outside of the building?

Seriously, get it registered.
I've read a couple of pages of that long register battery thread and have yet to find anyone who had their battery fail early due to non-registering
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  #14  
Old 05-23-2013, 01:49 PM
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bocabimmer bocabimmer is offline
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Mein Auto: '06 E90 325i '07 E92 328i
changing my battery

I'm going on a year with no explosions. My car does have some issues starting though and I'm pretty sure it's not power draw. I do, however, only take short trips.


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  #15  
Old 05-23-2013, 04:14 PM
Tom K. Tom K. is offline
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Originally Posted by Watchme View Post
I've read a couple of pages of that long register battery thread and have yet to find anyone who had their battery fail early due to non-registering
My understanding is that registering the battery allows the IBS to charge at the proper rate. When the IBS on my E91 malfunctioned, it was causing the alternator to put out 17.5 volts which is not very good for much of the electronic gear on the car - some of which will cost a great deal more than a battery.

But it's your car & your money...

Tom
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  #16  
Old 05-24-2013, 08:58 PM
ds-- ds-- is offline
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i am in the same boat - need to change the battery on 328xi 07.
the car starts/runs fine, but the battery doesnt hold long enough to even reset replaced filter.
I called around and seems like the cheapest OEM battery I can get is $205, or I can go with other brands at around $150.
Then comes the installation from $120 at the guy around the corner to 150-200 at dealers.
But then comes another 180-250 for registering the battery (including guy on the corner).
I feel like they are all robbing me blind...

Anyone has a recommendation for reasonable mechanic in North Jersey area (20-30 mile range from NYC)?
Also any recommendations on battery? Is AZ duralast Platinum H8-AGM better than duralast H7-AGM ?

Thanks guys!
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  #17  
Old 05-25-2013, 12:11 AM
ctuna ctuna is offline
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Are you sure you have an AGM?

Are you sure you have an AGM?
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  #18  
Old 05-25-2013, 04:02 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by ds-- View Post
i am in the same boat - need to change the battery on 328xi 07.
the car starts/runs fine, but the battery doesnt hold long enough to even reset replaced filter.
I called around and seems like the cheapest OEM battery I can get is $205, or I can go with other brands at around $150.
Then comes the installation from $120 at the guy around the corner to 150-200 at dealers.
But then comes another 180-250 for registering the battery (including guy on the corner).
I feel like they are all robbing me blind...


Anyone has a recommendation for reasonable mechanic in North Jersey area (20-30 mile range from NYC)?
Also any recommendations on battery? Is AZ duralast Platinum H8-AGM better than duralast H7-AGM ?

$300-$450 for labor?

Hey, be good to yourself -- buy THIS -- do THIS -- don't forget Post #21.

You've learned a few things and have a useful tool, not just for BMW neither. You still spend less!

.

Last edited by CALWATERBOY; 05-25-2013 at 04:04 AM.
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  #19  
Old 05-25-2013, 08:59 AM
Tom K. Tom K. is offline
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Quote:
Originally Posted by ds-- View Post
i am in the same boat - need to change the battery on 328xi 07.
the car starts/runs fine, but the battery doesnt hold long enough to even reset replaced filter.
I called around and seems like the cheapest OEM battery I can get is $205, or I can go with other brands at around $150.
Then comes the installation from $120 at the guy around the corner to 150-200 at dealers.
But then comes another 180-250 for registering the battery (including guy on the corner).
I feel like they are all robbing me blind...

Anyone has a recommendation for reasonable mechanic in North Jersey area (20-30 mile range from NYC)?
Also any recommendations on battery? Is AZ duralast Platinum H8-AGM better than duralast H7-AGM ?

Thanks guys!
I'd check other dealers as my DC area dealer charged $393 last year including the battery, labor, registration shop supplies and sales tax. $205 sounds about right for and OEM battery, but installation and registration shouldn't be over $200 combined.

Tom
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  #20  
Old 05-25-2013, 09:50 AM
ds-- ds-- is offline
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Location: new jersey
 
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Quote:
Originally Posted by ctuna View Post
Are you sure you have an AGM?
I have a stock battery, so i would say - i am sure i dont have AGM. Those are just what comes up as compatible on autozone site. I called couple of locations around me and all have said they cant even replace it because it needs special cable (registration).

Thanks guys for your advice - I'll keep looking at other options.
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  #21  
Old 05-27-2013, 05:31 PM
BKMBMW BKMBMW is offline
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Re: changing my battery

Im stationed at Fort Dix. I go to Indy shop 20 min away. I had battery changed two weeks ago in 06 330xi. $175 total with registration and battery.

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