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      07-23-2014, 01:44 PM   #89
mleskovar
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Originally Posted by Phlonx View Post
I thought that was the case but I keep reading that there are no exceptions to the coding/registering. Do you know from experience?
No. But think about it. All the 'coding' does is match the battery configuration and if you're replacing with a like battery there would be nothing to change.
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      07-23-2014, 01:48 PM   #90
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By the way, my car is an '08 with 63k miles. I had the yellow battery light come on the dash a few times and then the halo's stopped turning on when I unlock the car. After some research I learned that means my battery is getting near the end of it's life. I recently made a few long trips and ensured the battery was thoroughly charged before deciding to replace it...

Just making sure we stay on topic and all... Anybody else have experience with coding or not coding a replacement battery?
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      07-23-2014, 02:33 PM   #91
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Quote:
Originally Posted by mleskovar View Post
No. But think about it. All the 'coding' does is match the battery configuration and if you're replacing with a like battery there would be nothing to change.
I appreciate your input but I have thought about it and all of it is a little weird. I've read that no matter if it is the same battery or different, the alternator adapts to not only the current/voltage/amps etc. of the battery but it's age and condition as well and thus it needs to be coded/registered with the car no matter what
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      07-23-2014, 09:00 PM   #92
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77k still going strong. Going to have it checked soon and most likely replace not long after
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      07-23-2014, 11:19 PM   #93
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Quote:
Originally Posted by Phlonx View Post
I appreciate your input but I have thought about it and all of it is a little weird. I've read that no matter if it is the same battery or different, the alternator adapts to not only the current/voltage/amps etc. of the battery but it's age and condition as well and thus it needs to be coded/registered with the car no matter what
You are correct. An old battery may still be performing to tolerances, but it is not performing nearly as well as a new one. Its a difference of a couple volts and a few amps on the circuit. The car adapts charging and discharging rates of the battery to meet the current condition of the battery. Since a new one performs to a different spec than an aged one, you need to have the car recoded.
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      07-24-2014, 06:44 AM   #94
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Quote:
Originally Posted by mleskovar View Post
No. But think about it. All the 'coding' does is match the battery configuration and if you're replacing with a like battery there would be nothing to change.
This statement is not entirely correct. The coding also tells the car there is a new battery, and the car re-charges a new battery differently then an old one.

If you put a new battery in, and don't re-code, it could reduce the life of your new battery.
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      07-24-2014, 07:43 AM   #95
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Quote:
Originally Posted by BrokenVert View Post
You are correct. An old battery may still be performing to tolerances, but it is not performing nearly as well as a new one. Its a difference of a couple volts and a few amps on the circuit. The car adapts charging and discharging rates of the battery to meet the current condition of the battery. Since a new one performs to a different spec than an aged one, you need to have the car recoded.
OK, that confirms my suspicion. So...... How do I code it?!
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      07-24-2014, 08:09 AM   #96
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mid year '09, have a 1500W subwoofer that I wang almost daily.
Battery is still going strong, not voltage droop or hard starts.
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      Yesterday, 09:26 AM   #97
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Any help with coding my new battery?
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      Yesterday, 11:15 AM   #98
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      Yesterday, 11:57 AM   #99
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Any help with coding my new battery?
See attached. Might be better to go search in the E90 section. There is an entire thread on the topic.
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      Yesterday, 01:25 PM   #100
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Quote:
Originally Posted by Iron Man View Post
See attached. Might be better to go search in the E90 section. There is an entire thread on the topic.
Attached? Not sure where to click? Searching for threads but easier said than done...
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      Yesterday, 04:47 PM   #101
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Attached? Not sure where to click? Searching for threads but easier said than done...
Sorry, I thought I had attached the file. Will have to send tomorrow, since the file is on my other computer. If you search the E90 forums, there are several threads on coding/registering batteries.

File attached. You can check out the bimmer software website. Do searches on here for NCS Expert, INPA and BMW Logger.
Attached Images
File Type: pdf BMW Aftermarket Battery Registration DIY.pdf (475.8 KB, 2 views)
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Last edited by Iron Man; Today at 06:54 AM.
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      Yesterday, 05:18 PM   #102
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only 40k miles though
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