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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > need new battery, help please



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      11-30-2012, 02:13 PM   #23
oshusttoley
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Thanks everyone !
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      11-30-2012, 02:33 PM   #24
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Wow i thought it was more. 300 not bad at dealer for oem. What signs did you have to get new one
I take that back..

I am picking up the car this afternoon, and what I thought was going to be 300-330 is now close to $400...

O well, they found another item wrong with my car covered under CPO which sort of makes up for it, enough though I still have to pay a $50 deductable.

My signs were, my car is an 08 and had the originally battery! haha, but no, 2 or 3 times over the last 3 months i would get the "battery symbol" on my dash when I put the key in or after i turned the car off and the key was still inserted for a minute or two.

But what really showed me was, over the last 2-3 weeks, my clock has stopped working - or should I say, kept resetting itself to "--:--" time. Sometimes I would start the car and the time would be kept from last time, other times id start the car and no time AND the trip OD would be reset.

all signs pointed to a failing battery. BMW says some of the electronics will start "acting up" and shut themselves down to conserve power.

Plus with the cold weather coming up (i am in PA) had to replace it - didnt want to go leave for work one morning and have the car not start.
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      11-30-2012, 03:59 PM   #25
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so i have an 08 e90. every couple days my when i start my car i get "increased battery dischange" shows up on my nav screen. does this mean i need a new battery soon? also the clock resets everytime and its getting annoying lol. If i do need a new a battery, what one do i need from like advanced auto or pepboys? i rather not spend 500 at bmw.... also i heard i need to register the new battery...how do i go about doing this? sorry if this has been posted before but i really dont know a lot about this kind of stuff. i just drive my car lol. i dont know a lot of technical stuff about it.
Sounds like a battery taking a crap. How is it starting? Does it start slowly? My battery was built in 2007 so it was not original to the car but still 5 years old. It was starting slowly the colder it got outside. I researched replacement batteries and finally settled on the Bosch 94R-730B sold at Pep Boys for $160 or so. It is white like the BMW battery and exactly the same size. Its CCA is slightly higher on the new battery. I went from 640CCA to 730CCA. I have a Bavarian Tech cable and the program allowed me to register the new battery. It is about a 30 min job start to finish.
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      11-30-2012, 04:27 PM   #26
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Originally Posted by oshusttoley View Post
so i have an 08 e90. every couple days my when i start my car i get "increased battery dischange" shows up on my nav screen. does this mean i need a new battery soon? also the clock resets everytime and its getting annoying lol. If i do need a new a battery, what one do i need from like advanced auto or pepboys? i rather not spend 500 at bmw.... also i heard i need to register the new battery...how do i go about doing this? sorry if this has been posted before but i really dont know a lot about this kind of stuff. i just drive my car lol. i dont know a lot of technical stuff about it.
Sounds like a battery taking a crap. How is it starting? Does it start slowly? My battery was built in 2007 so it was not original to the car but still 5 years old. It was starting slowly the colder it got outside. I researched replacement batteries and finally settled on the Bosch 94R-730B sold at Pep Boys for $160 or so. It is white like the BMW battery and exactly the same size. Its CCA is slightly higher on the new battery. I went from 640CCA to 730CCA. I have a Bavarian Tech cable and the program allowed me to register the new battery. It is about a 30 min job start to finish.
Its starts perfectly fine. What model BMW do u have? And does it matter if the one ubuy is higher output?
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      11-30-2012, 04:40 PM   #27
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so i opened the trunk area to see what kind of battery to see what i have and when it was made, i couldnt find a date but i found this one wire that is unplugged? please look at the pics below.... what is this? and why is it unplugged
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      11-30-2012, 04:47 PM   #28
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It is intellegent battery sensor. Look at page 8 of this doc http://www.e90post.com/forums/attach...6&d=1353545953
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      11-30-2012, 04:56 PM   #29
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It is intellegent battery sensor. Look at page 8 of this doc http://www.e90post.com/forums/attach...6&d=1353545953
why do you think its not plugged in? should i plug it in?
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      11-30-2012, 05:27 PM   #30
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Yes, it should plug in according to the document
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      11-30-2012, 05:45 PM   #31
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Yes, it should plug in according to the document
If I can find out where lol
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      11-30-2012, 06:25 PM   #32
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That connector is only for shipping

It puts the car into a deeper sleep mode so the battery is not drained as fast
. The IBS Cable comes from the negative terminal of the battery and is plugged into the distribution block on top of the battery. I think I can see the IBS Cable in black going under the black hold down piece that's going under it and originating at the negative terminal.

http://www.google.com/url?sa=t&rct=j...QNFyu70IsyKRlg
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      11-30-2012, 06:56 PM   #33
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It puts the car into a deeper sleep mode so the battery is not drained as fast
. The IBS Cable comes from the negative terminal of the battery and is plugged into the distribution block on top of the battery. I think I can see the IBS Cable in black going under the black hold down piece that's going under it and originating at the negative terminal.

http://www.google.com/url?sa=t&rct=j...QNFyu70IsyKRlg

but where do i plug it into? so if i plug it in, it will save my battery more?
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      11-30-2012, 07:42 PM   #34
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It should connect to the female connector as shown in the picture
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      11-30-2012, 09:24 PM   #35
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Quote:
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It should connect to the female connector as shown in the picture
I can't see where that is. It's super blurry but thanks anyway
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      11-30-2012, 09:43 PM   #36
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There is one connector that is only for BMW shipping

There is one connector that is only for BMW shipping
It is only used by BMW it has no use for you . People ask that
question over and over again.
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      12-01-2012, 10:38 AM   #37
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Its starts perfectly fine. What model BMW do u have? And does it matter if the one ubuy is higher output?
E90 330i built in 5/05.
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      12-01-2012, 12:01 PM   #38
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Quote:
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There is one connector that is only for BMW shipping
It is only used by BMW it has no use for you . People ask that
question over and over again.
So leave it alone and un-plugged?
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      12-01-2012, 12:23 PM   #39
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Yes

Yes
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