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Old 02-16-2010, 11:06 PM
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X5 4.4 battery

Does anyone know for certain if the stock battery in an E53 4.4 is maintenance free and completely sealed, or are the cell screws just covered up by a sticker as was always the case on older BMW's? Also, does anyone know the exact specifications of the original battery and who actually manufactured it?
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Old 02-16-2010, 11:54 PM
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There are the screws covered by sticker


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Originally Posted by X5 Meister View Post
Does anyone know for certain if the stock battery in an E53 4.4 is maintenance free and completely sealed, or are the cell screws just covered up by a sticker as was always the case on older BMW's? Also, does anyone know the exact specifications of the original battery and who actually manufactured it?
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Old 02-17-2010, 01:49 AM
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Thanks
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Old 02-17-2010, 01:51 AM
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I just peeled off the sticker on mine the other day. 2002 4.6is, and didn't have the screws. Went ahead and made the trip to Wally World.
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Old 02-17-2010, 01:54 AM
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Hmmm. Interesting. I wonder if BMW Canada specs different batteries than BMW NA?
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Old 02-17-2010, 02:19 AM
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A couple of related posts:
Replacement Batts(Non-OEM)
Possible OEM-Exide
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Old 02-17-2010, 02:34 AM
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The official Battery thread.

http://www.xoutpost.com/bmw-sav-foru...apped-out.html
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Old 02-17-2010, 02:40 AM
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Thanks for the great links guys.
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Old 02-17-2010, 11:09 AM
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Could the battery eye showing black be a contributing cause to the Self Leveling Suspension being inactive? I am out on a limb here, but heck, it's all electrical probably, right?
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Old 02-25-2010, 09:16 PM
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I doubt it. You should be aware that just because the battery "magic eye" (which is just ah integrated hydrometer) is black it's not a reason to replace the battery altogether, it is just caused by acid lamination within the battery. If the battery reads a voltage of 12.7 volts and the eye is black, just turn the battery over once to remove the lamination and it should turn green. Also remember that the green / black eye is only an indicator of the cell to which it is attached.

In general if the eye is green the battery charge is adequate. If it is black the battery is inadequately charged and should be fully recharged. If it is pale yellow the acid level is too low and the battery should be replaced.

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Originally Posted by x5mke View Post
Could the battery eye showing black be a contributing cause to the Self Leveling Suspension being inactive? I am out on a limb here, but heck, it's all electrical probably, right?

Last edited by X5 Meister; 03-04-2010 at 10:29 PM.
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