Ah (amp hours) for stock battery?

Subw00er · 07-23-2009, 01:45 PM

Does anyone know how many Ah (amp hours) our stock battery is?

Technic · 07-23-2009, 01:59 PM

Quote:

Originally Posted by Subw00er

Does anyone know how many Ah (amp hours) our stock battery is?

All M3 models: http://www.realoem.com/bmw/showparts...99&hg=61&fg=30

Subw00er · 07-23-2009, 04:05 PM

Not sure which one I have, but it looks like its 70-90 Ah, ok thanks!

swamp2 · 07-23-2009, 05:30 PM

90 A h.

Lemans_Blue_M · 07-23-2009, 05:35 PM

This is a little tricky.

ALL E90,92,93 M3's roll out of the Regensburg factory with 90AH 900A batteries installed. (stock OE specification)

Now here is where it gets tricky...

If your battery dies completely, or becomes discharged in such a manner that it can no longer hold a charge...the dealer will replace it under warranty.

The thing is...BMW has contracts with 2 different U.S.-based battery companies. So the replacement batteries at the dealerships will range from 70AH/570A to 90AH/720A batteries that are on hand.

This varies from dealership to dealership.

Why?

Because BMW is footing the bill under the new vehicle warranty, so they buy the slightly smaller batteries that are cheaper per unit than the 90AH/900A OE factory spec'd battery.

The point is, you will never get exactly the same size battery as the car originally had when it was first built.

07-23-2009, 01:45 PM	#1
Subw00er Bates '08 Interlagos Launch 126 Rep 1,230 Posts Drives: 440i xGC, ZL1, JCW Join Date: Nov 2005 Location: NY iTrader: (2)	Ah (amp hours) for stock battery? Does anyone know how many Ah (amp hours) our stock battery is? __________________ Custom Exhaust Project: Bates Valvetronic exhaust: http://www.m3post.com/forums/showthread.php?t=253661 -- Exhaust Mod pics in here: http://www.flickr.com/photos/40236795@N03/ DON'T BUY Race Ready Performance electronic cutout valves. Here's why: http://www.m3post.com/forums/showthr...40#post9589740
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07-23-2009, 04:05 PM	#3
Subw00er Bates '08 Interlagos Launch 126 Rep 1,230 Posts Drives: 440i xGC, ZL1, JCW Join Date: Nov 2005 Location: NY iTrader: (2)	Not sure which one I have, but it looks like its 70-90 Ah, ok thanks! __________________ Custom Exhaust Project: Bates Valvetronic exhaust: http://www.m3post.com/forums/showthread.php?t=253661 -- Exhaust Mod pics in here: http://www.flickr.com/photos/40236795@N03/ DON'T BUY Race Ready Performance electronic cutout valves. Here's why: http://www.m3post.com/forums/showthr...40#post9589740
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07-23-2009, 05:30 PM	#4
swamp2 Lieutenant General 609 Rep 10,407 Posts Drives: E92 M3 Join Date: Sep 2006 Location: San Diego, CA USA iTrader: (3)	90 A h. __________________ E92 M3 \| Space Gray on Fox Red \| M-DCT \| CF Roof \| RAC RG63 Wheels \| Brembo 380mm BBK \| \| Vorsteiner Ti Exhaust \| Matte Black Grilles/Side Gills/Rear Emblem/Mirrors \| \| Alekshop Back up Camera \| GP Thunders \| BMW Aluminum Pedals \| Elite Angels \| \| XPEL Full Front Wrap \| Hardwired V1 \| Interior Xenon Light Kit \|
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07-23-2009, 05:35 PM	#5
Lemans_Blue_M Automotive Industry Insider 462 Rep 1,948 Posts Drives: Lemans Blue M3 Join Date: Aug 2007 Location: Texas iTrader: (0)	This is a little tricky. ALL E90,92,93 M3's roll out of the Regensburg factory with 90AH 900A batteries installed. (stock OE specification) Now here is where it gets tricky... If your battery dies completely, or becomes discharged in such a manner that it can no longer hold a charge...the dealer will replace it under warranty. The thing is...BMW has contracts with 2 different U.S.-based battery companies. So the replacement batteries at the dealerships will range from 70AH/570A to 90AH/720A batteries that are on hand. This varies from dealership to dealership. Why? Because BMW is footing the bill under the new vehicle warranty, so they buy the slightly smaller batteries that are cheaper per unit than the 90AH/900A OE factory spec'd battery. The point is, you will never get exactly the same size battery as the car originally had when it was first built. __________________ The best is yet to come...
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