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Old 03-20-2012, 01:54 PM
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QSilver7 QSilver7 is online now
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Location: Northeast Indiana
Join Date: Aug 2008
Posts: 9,050
Mein Auto: 1997 740iL / 2006 X5 4.4
Originally Posted by zzvelik View Post
1.... By the way, does anyone know the OEM battery's CCA rating? Thanks for the help.
2. I also bought a battery from Walmart yesterday, the H8 Everstart Maxx which has a lower rating of 760 CCA (& NO VENT TUBE) compared to 850 CCA of the previous Maxx 49 battery.
1. According to the part database (realoem)...the e39 battery (BMW part nbr 61 21 8 381 762) is listed as 720a/850ca. You give no indication of WHICH e39 you have in your posts since you have no signature with model/model year/build date listed...and you only have "e39" listed in the upper right under "cars" I have no idea of which diagram or part nbr list to share with you...but if you click this link for the can see the list of batteries BMW used:

2. The e39 can use multiple class size batteries (49/H8/94/95/H9)...some of them vent from the top center and some vent from the side (like the BMW original battery). If you haven't look in either locations...then that is why you may have missed the vent hole in the battery.

If it vents from the requires the little black elbow that originally came with the car...if it vent's from the top...then you need the vent kit with the elongated "L" extension tube that should have come with the battery.

(you can see the little black elbow in the pic below of the car's vent tube)

(side vented battery)

(top center vented battery w/vent kit attached)

Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

Last edited by QSilver7; 03-20-2012 at 01:57 PM.
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