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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > DIY: Replacing the battery for an e90



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DIY: Replacing the battery for an e90
Published by modeno
05-30-2010
DIY: Replacing the battery for an e90

Parts required:
New battery - ~$300
Tools required:
Socket wrench - 10mm and 13mm sockets
Screwdriver - Philips and Flathead
Eye goggles (for eye protection from exploding battery)
(Disclaimer - Car batteries can explode, so consider professional installation)
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  #1  
By 777ER on 05-30-2010, 08:52 PM
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Jeez that's alot of plugs and bolts to remove just to replace a battery...

and $300 for a new one?!

FYI: Don't store batteries on concrete floors, best to keep them at least a inch off the floor or on a shelf.


I can change two 28 volt batteries in a 757-200 quicker than it would take in my car...
Open access hatch, disconnect temp sensor cannon plugs (one each battery) cut copper safety wire off knob, turn em halfway and off they come, unscrew the two bottom retainers knob and they slide out.
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  #2  
By taytay on 05-30-2010, 09:27 PM
don't forget to get your battery registered!
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  #3  
By Mnut on 05-30-2010, 09:40 PM
just had to swap out my battery not an easy task on the side of the road...
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  #4  
By Euro_man on 06-01-2010, 11:00 PM
Anyone done a DIY for an aftermarket battery such as a yellow top?
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  #5  
By chazzz on 06-02-2010, 06:23 PM
Did you get this battery from a local BMW dealer? I noticed "EXIDE" logo on the top of the battery (new battery), wondering if I can find it Exide battery at AutoZone or PepBoys?
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  #6  
By boozham on 07-23-2010, 04:20 PM
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I swapped out my battery on my own using an Interstate battery. I've heard rumors that you have to register/reset (aka have the stealership rape you) but its BS. You can use any battery as long as it has the same spec's as the mfg battery (your local autoparts store or even Walmart can look it up for you). Many other have successfully done this on their own too! Been over 6 months for me with no issues.
Last edited by boozham; 07-23-2010 at 04:26 PM.
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  #7  
By rg87 on 09-06-2010, 01:41 AM
this is sounding like somewhat of a "noob" question... but is it really necessary to register the battery?? from what i've been reading on the forum, so issues might arise if you don't register the battery? also, what if i decide to go with another brand besides bmw, will I need to register it?
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  #8  
By tiw30 on 09-06-2010, 02:07 PM
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WARNING

The negative post should always be disconnected first (stops tools shorting between terminal and body when undoing the positive terminal)
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  #9  
By chuckee98 on 09-08-2010, 12:29 PM
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Quote:
Originally Posted by tiw30 View Post
WARNING

The negative post should always be disconnected first (stops tools shorting between terminal and body when undoing the positive terminal)
Yes, and also (re)connected LAST when everything is done.
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  #10  
By stargate823 on 04-07-2011, 07:40 PM
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While I see that this is an ancient thread... I cannot help myself....

If you pay $300.00 for a replacement battery... then perhaps there needs to be a new DIY on "how to buy a battery."
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  #11  
By Scott C BMW on 04-09-2011, 06:08 AM
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Quote:
Originally Posted by stargate823 View Post
While I see that this is an ancient thread... I cannot help myself....

If you pay $300.00 for a replacement battery... then perhaps there needs to be a new DIY on "how to buy a battery."
Buy one for less - let us know where... Here is my experience

In looking for one for my E60, I tried the typical autozone/advance auto parts...
Not the same battery, CCA was same but physical size and weight and capacity was not. Venting was also a little different. I ended up with dealer battery for ~250 - is that a steal?
Scott
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  #12  
By BloodRed3 on 04-18-2011, 11:29 PM
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I replaced my battery a few months ago and now I have airbag and seatbelt lights on the dash. Anyone else run into this problem?
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  #13  
By jvxbimmer on 04-20-2011, 12:45 AM
Nop. But interesting !!!
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  #14  
By RBinDC on 05-24-2011, 10:14 AM
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Tischer BMW discounts the BMW Batteries purchased online.

Quote:
Originally Posted by Scott C BMW View Post
Buy one for less - let us know where... Here is my experience
Got to: http://www.getbmwparts.com/

I priced out a battery for a 2011 335i and it came to $145 (vs. $200 MSRP). It is an EXIDE brand. For that price I would not bother taking a chance at Sears, AutoZone, etc.

Now the question is what will a dealer charge to register the battery once it is installed. That's where the hosing takes place.
Last edited by RBinDC; 05-24-2011 at 10:16 AM. Reason: spelling
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  #15  
By baron62 on 05-24-2011, 07:02 PM
Very nice good with the description and pics! Thank you
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  #16  
By Glim on 06-25-2011, 12:57 AM
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Interstate battery here, they looked up the part and had a choice of a similar capacity AGM which is what I wanted, they are military grade indestructible batteries with a 7 year warranty and much lighter than the lead acid one it replaced. It cost about the same as the dealership was charging for a lead acid exide.

Update: I have received a Bavarian technic tool and have registered the new battery
Last edited by Glim; 07-01-2011 at 09:51 AM.
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  #17  
By Barrique_Red on 03-18-2012, 10:44 AM
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Any idea what the thread on the Negative battery cable is for? Mine seems to have fallen off. It does not seem to be conductive. It sorta fell off while I was removing/reattaching the negative cable. Thanks, mikey!
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  #18  
By Haasman on 05-01-2013, 12:01 PM
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Great help. Replaced the battery, thank you!

But .... where does this wire go?



Haasman
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  #19  
By bchuong58 on 05-01-2013, 02:58 PM
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Quote:
Originally Posted by Haasman View Post
Great help. Replaced the battery, thank you!

But .... where does this wire go?



Haasman
It is a no connection connector.
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  #20  
By 06az330i on 05-06-2013, 12:59 PM
I have the same question about that extra wire?? what is a no connection connector???
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  #21  
By 1QuikWS6 on 05-14-2013, 04:31 AM
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Quote:
Originally Posted by 06az3301 View Post
I have the same question about that extra wire?? what is a no connection connector???
That wire is used during transport of new car - to be ignored & it doesn't connect to anything...


Quote:
FYI: Don't store batteries on concrete floors, best to keep them at least a inch off the floor or on a shelf.
Untrue

This was the case waaaaaayyyyyy back when when batteries where constructed of different materials - no longer the case...

http://www.snopes.com/autos/techno/battery.asp
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