2019 i3s battery type question

sandi629 · 08-31-2022, 05:19 PM

I have a 2019 i3s that is supposed to have a 120ah battery. Went into BimmerCode to do some coding and the battery on my car is checked off as 20ah. Am I looking at 2 different types? Newbie with Ev’s so could definitely be me.

sandi629 · 08-31-2022, 06:15 PM

So, the plot thickens, realize that I have a 42.2 kWh battery and when I go into coding it show fully charged as 38.6. That doesn’t seem too bad for 2019 used i3s. Only question I still have is when I go into coding under battery type, it says 20AH. Any ideas? Is the wrong battery size programmed in the car?

vreihen16 · 08-31-2022, 06:56 PM

20Ah is the 12 volt aux battery under the hood, not the high voltage traction battery.

I suggest that you go looking for it under the hood now, because they seem to have a ~3 year lifetime and your 2019 will probably be needing a new one soon.....

sandi629 · 08-31-2022, 08:52 PM

Duh, didn’t even think about that. Thanks!!

JohnWasser · 09-01-2022, 07:39 PM

Could you be looking at the 12V battery? One of the standard 12V batteries is 20 Ah (240 Wh).

A 120 Ah 352 V battery would be about 42 kWh.

08-31-2022, 05:19 PM	#1
sandi629 Registered 2 Rep 3 Posts Drives: BMW i3s Join Date: Aug 2022 Location: NJ iTrader: (0)	2019 i3s battery type question I have a 2019 i3s that is supposed to have a 120ah battery. Went into BimmerCode to do some coding and the battery on my car is checked off as 20ah. Am I looking at 2 different types? Newbie with Ev’s so could definitely be me.
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08-31-2022, 06:15 PM	#2
sandi629 Registered 2 Rep 3 Posts Drives: BMW i3s Join Date: Aug 2022 Location: NJ iTrader: (0)	So, the plot thickens, realize that I have a 42.2 kWh battery and when I go into coding it show fully charged as 38.6. That doesn’t seem too bad for 2019 used i3s. Only question I still have is when I go into coding under battery type, it says 20AH. Any ideas? Is the wrong battery size programmed in the car?
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08-31-2022, 06:56 PM	#3
vreihen16 Recovering Perfectionist 15268 Rep 941 Posts Drives: 2015 BMW i3 BEV Join Date: Jun 2019 Location: Orange County, NY iTrader: (0) Garage List 2014 Mighty Freight ... [0.00] 2015 BMW i3 BEV [0.00] 2000 Audi TT Quattro [0.00] 1967 Formula Vee [0.00]	20Ah is the 12 volt aux battery under the hood, not the high voltage traction battery. I suggest that you go looking for it under the hood now, because they seem to have a ~3 year lifetime and your 2019 will probably be needing a new one soon..... __________________ 2015 BMW i3 BEV, Giga World (Lodge interior), Tech/Driving Assist Packages, 30K miles
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08-31-2022, 08:52 PM	#4
sandi629 Registered 2 Rep 3 Posts Drives: BMW i3s Join Date: Aug 2022 Location: NJ iTrader: (0)	Duh, didn’t even think about that. Thanks!!
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09-01-2022, 07:39 PM	#5
JohnWasser New Member 13 Rep 22 Posts Drives: BMW i3 Join Date: Apr 2020 Location: EasternMassachusets iTrader: (0)	Could you be looking at the 12V battery? One of the standard 12V batteries is 20 Ah (240 Wh). A 120 Ah 352 V battery would be about 42 kWh.
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