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      02-15-2013, 12:08 AM   #23
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Originally Posted by JHZR2 View Post
OEM battery or what?

The simplest way is to set up an appointment and get it changed. Youll get a BMW battery and they will program, and charge you the time to install.

Alternately you can buy a battery wherever you want, install it at the dealer and ask them to program. Youll still need an appointment, and they will have to do it.

No idea how long or how much for either approach. Other threads give some ideas.
Is there a general consensus yet on replacing the battery? Should we stick strictly with the OEM one?
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      02-15-2013, 12:32 AM   #24
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Here is my angle...

The autocraft silver battery from Advance Auto parts is a screaming deal. Whlie they try to tell you to go absolute highest CCA, this drives you to thinner grids that dont necessarily have the mechanical robustness of a lower current, similar energy battery, which will have heavier, more robust grids.

The silver line of batteries appears to be right about the sweet spot. And, with one of their 40% off coupons, can be had really cheap.

So then it comes back to registering.

If I can buy a battery for $70 or so, it only makes sense to do the registering at the dealer for $100 or more if it will truly double the life of my battery or prevent adverse effects. I do not know that either of these are the case. if the car kills the battery early, the risk is with the battery maker, not you.

That said, I like a tip-top operating machine, so registration may be worth it. Ill personally most likely go with the AAP silver battery and buy a BT tool, which will be handy down the line, and register myself.

Id love to know how to code it so I could install an AGM instead of a flooded battery in there on the cheap. Im not paying a dealer $500 to do it. I like AGM in applications like a trunk mount, because of the super-low gassing and longer life.

But if youre willing to bypass the dealer, the AAP silver battery is about the best deal out there, and is equal to or better than the dealer battery. IIRC, the dealer battery is an Exide, which typically is the worst of the main three manufacturers.
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      02-15-2013, 08:11 AM   #25
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I've only looked at the documentation for the BT tool but it appears all it will do is register a like for like battery. Same size and type. With NCSExpert, you could change battery type and size. It also costs less. I would also bet the BT tool is easier to use but NCSExpert is not terrible. You just have to follow directions exactly even though they aren't very user friendly. Essentially you plug into the OBDII, set the car to on, download the module you want to change, make the changes, and then upload the module. The menu selections you make are in German, however, so I need detailed instructions.

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      02-15-2013, 12:53 PM   #26
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Yeah the BT tool only allows registration, not programming. The NCSE software looks like a mess to me personally...

Im good with computers and programming, but would prefer to spend some money for something turnkey rather than hacking it... Just dont want to pay the dealer $500 or whatever the costs are...
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