E84 X1 Battery charging / changing

PhilER · 01-19-2024, 05:41 AM

My wife's E84 X1 has been struggling to start this week after some cold nights.

I connected a battery charger at the engine bay terminals, and the charger said that the battery was at 100% charged, and the charger went in to "maintain" mode.
I was a bit suspicious, so I went to the boot and connected the charger there (not plugged in to charge) and it said the battery was only at 40%

Any ideas what's going on with that?

What is the correct process to disconnect the battery (so I can check it's condition and charge it while it is out of the car), and then reconnect either the existing battery or a replacement?

I know that I'll have to register it if it's a new battery.

I've heard that not following the correct process can result in the FRM3 Footwell Module software being corrupted during battery changing, which will cost to have the FRM software re-flashed, so I'd like to avoid that!

VacMiller · 01-25-2024, 08:22 PM

Hey man - planning to tackle my battery switch this weekend using a YouTube DIY and BimmerLink to register the battery.

I grabbed a Duracell (deka/East Penn) 80Ah 94R AGM from Batteries Plus.

Will keep you posted on how it goes.

VacMiller · 02-04-2024, 11:07 AM

Size 94R battery went in seamlessly, pictures attached for comparison of original and new battery for anyone doing this DIY.

808tileguy · 03-28-2024, 05:39 PM

Aloha

I have a 2014 x1 35i M Sport with 40,100 miles on her.

When starting the car all the lights die for a second before starting. Starts almost every 1st try but since this is the wife's car I want to replace the battery. I have had a lot Bmw through out my life. currently I have
2008 335i
2012 x5 50i
2013 x5m
2011 x5 35i

and of course the Baby X1.SIDE NOTE: two more and id have one for every day of the week

I think i replaced the battery on all of my current fleet and I have never coded any of them ....

I cant think of any immediate issues , Maybe there is long term ones... but im a little skeptical on the whole registering and coding requirements

any thoughts , experience s , comments or even a educational bash or two is greatly appreciated

01-19-2024, 05:41 AM	#1
PhilER Registered 0 Rep 3 Posts Drives: BMW F10 535d, BMW E84 X1 Join Date: May 2021 Location: UK iTrader: (0)	E84 X1 Battery charging / changing My wife's E84 X1 has been struggling to start this week after some cold nights. I connected a battery charger at the engine bay terminals, and the charger said that the battery was at 100% charged, and the charger went in to "maintain" mode. I was a bit suspicious, so I went to the boot and connected the charger there (not plugged in to charge) and it said the battery was only at 40% Any ideas what's going on with that? What is the correct process to disconnect the battery (so I can check it's condition and charge it while it is out of the car), and then reconnect either the existing battery or a replacement? I know that I'll have to register it if it's a new battery. I've heard that not following the correct process can result in the FRM3 Footwell Module software being corrupted during battery changing, which will cost to have the FRM software re-flashed, so I'd like to avoid that!
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01-25-2024, 08:22 PM	#2
VacMiller New Member 0 Rep 7 Posts Drives: E84 X1 N55 Join Date: Jan 2024 Location: Phila iTrader: (0)	Hey man - planning to tackle my battery switch this weekend using a YouTube DIY and BimmerLink to register the battery. I grabbed a Duracell (deka/East Penn) 80Ah 94R AGM from Batteries Plus. Will keep you posted on how it goes.
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02-04-2024, 11:07 AM	#3
VacMiller New Member 0 Rep 7 Posts Drives: E84 X1 N55 Join Date: Jan 2024 Location: Phila iTrader: (0)	Size 94R battery went in seamlessly, pictures attached for comparison of original and new battery for anyone doing this DIY. Attached Images
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03-28-2024, 05:39 PM	#4
808tileguy New Member 2 Rep 5 Posts Drives: 1-335i 1-X1 M X5m X5 50i X5 35 Join Date: Aug 2019 Location: hawaii iTrader: (0)	Battery replacement Coding and Reg requirements needed? Aloha I have a 2014 x1 35i M Sport with 40,100 miles on her. When starting the car all the lights die for a second before starting. Starts almost every 1st try but since this is the wife's car I want to replace the battery. I have had a lot Bmw through out my life. currently I have 2008 335i 2012 x5 50i 2013 x5m 2011 x5 35i and of course the Baby X1.SIDE NOTE: two more and id have one for every day of the week I think i replaced the battery on all of my current fleet and I have never coded any of them .... I cant think of any immediate issues , Maybe there is long term ones... but im a little skeptical on the whole registering and coding requirements any thoughts , experience s , comments or even a educational bash or two is greatly appreciated Attached Images
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