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      05-25-2014, 04:23 PM   #1
gray boy
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E90 battery color

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a friend looking for a battery (he has white color which i understand is non AGM?) it is shorter than the compartment.
We are confused why all the part stores(i.e. Autozones) call for AGM for E90?
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      05-25-2014, 08:27 PM   #2
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Be careful. I recommend you take a picture of top of your OEM battery. Ensure that you are getting a replacement that has the same capacity (Amp-hours). This is NOT cold cranking amps (CCA). My car came with the 94R size (slightly shorter than group 49 and is same as H8). I could only find the same A-hr in group 49 size. I happened to be going to dealer for oil change and told them i was getting messages about battery (insufficient charge) and they put another OEM one in it for free. They gave me the bigger group 49 size though. I had about 13 months o warranty left when they did this though.

You are right, white in lead acid and black is AGM. I did lots of looking and it appears that the easiest and surest thing to do is buy the battery from dealer and install yourself. Take the car to an indy for registration. My indy said he would do it for $50 if i had done all of the battery install myself. Many threads about why it is important to register your battery in car's computer. Closest aftermarket i found was in following link but it is an AGM. ($186).Size H8 is the european equivalent to US group 49. Sears also has group 49 in AGM for arounf same $180 approx.


For AGM, you have to change battery type not just have it registered. There are also threads for this but it sounds simpler to just go get the OEM battery for about $210. Make sure to connect up battery vent tube if you stick with Lead acid (white case). good luck
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      05-25-2014, 10:59 PM   #3
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Here's the one I used to replace my lead acid battery (NON AGM):

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      05-26-2014, 10:58 AM   #4
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My BMW AGM battery direct from my local BMW dealer is white and fills the tray completely (no need for foam spacer).
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2008 335i Alpine White Sport Sedan AT | Avant Garde M364 Staggered 19"
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