Coding AGM AH, go higher or lower??

iwagner · 01-24-2024, 08:22 PM

Just replaced the battery in my 2010 328i with a 100ah AGM and after registering it and coding in NCS Expert I see that they only have a 90ah_AGM and 105ah_AGM options.

Is it better to code it as a 90ah or 105ah? Much thanks!

BRG_N54 · 01-25-2024, 09:58 AM

Always go lower, overcharging can kill a new battery.

vester86 · 01-26-2024, 04:39 PM

battery bigger then coding, so you can never “overcharge”it.

i.e. try to put 100Ah in a 90Ah battery isn’t good for your battery

Matrix6048 · 01-29-2024, 06:38 AM

Coding for battery capacity is in groups of 10Ahr
- 90(-99Ahr)AGM
- 80(-89Ahr)AGM
- 70(-79Ahr)AGM
- 60(-69Ahr)AGM

iwagner · 01-30-2024, 09:59 AM

Appreciate the info, thanks!

01-24-2024, 08:22 PM	#1
iwagner New Member 8 Rep 9 Posts Drives: 2010 BMW 328i Join Date: Nov 2023 Location: Phoenix iTrader: (0)	Coding AGM AH, go higher or lower?? Just replaced the battery in my 2010 328i with a 100ah AGM and after registering it and coding in NCS Expert I see that they only have a 90ah_AGM and 105ah_AGM options. Is it better to code it as a 90ah or 105ah? Much thanks!
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01-25-2024, 09:58 AM	#2
BRG_N54 First Lieutenant 442 Rep 380 Posts Drives: Green '07 & Arctic '08 335i's Join Date: Jan 2023 Location: Monterey Peninsula iTrader: (0) Garage List 2008 BMW 335i [0.00] 2007 BMW 335i [0.00]	Lower FTW! Always go lower, overcharging can kill a new battery.
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01-26-2024, 04:39 PM	#3
vester86 Second Lieutenant 101 Rep 230 Posts Drives: BMW 330D '08 Join Date: Aug 2019 Location: Europe iTrader: (0)	battery bigger then coding, so you can never “overcharge”it. i.e. try to put 100Ah in a 90Ah battery isn’t good for your battery
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01-29-2024, 06:38 AM	#4
Matrix6048 New Member 3 Rep 9 Posts Drives: 330ci 2007 Join Date: Sep 2019 Location: Praha iTrader: (0)	Coding for battery capacity is in groups of 10Ahr - 90(-99Ahr)AGM - 80(-89Ahr)AGM - 70(-79Ahr)AGM - 60(-69Ahr)AGM
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01-30-2024, 09:59 AM	#5
iwagner New Member 8 Rep 9 Posts Drives: 2010 BMW 328i Join Date: Nov 2023 Location: Phoenix iTrader: (0)	Appreciate the info, thanks!
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