Low Battery Discharge

Scottyvh · 08-30-2016, 09:58 AM

I am always having a low battery discharge warning when starting the car each morning. If I park somewhere and keep only the radio on it lasts about 2 minutes max then everything shits down. Seriously no longer than two mins tops.

I have had this for a couple of months now and trying to hold out to next service but thats not for months.......

Surely my radar and dash cam plugged into the ash tray cant be the cause?

mazing M3 · 08-30-2016, 10:01 AM

Its time to change the battery.

G80indy · 08-30-2016, 11:53 AM

Quote:

Originally Posted by mazing M3

Its time to change the battery.

+1

dichoi · 08-30-2016, 12:02 PM

I had an increased battery discharge warning as well. Changed the battery and had it reprogrammed, but I'm still getting a warning. Only thing I can think of is that it may be an alternator issue, or they messed up programming it. Going to get it checked out next week. Will keep you posted

DaveDee · 08-30-2016, 04:18 PM

Quote:

Originally Posted by Scottyvh

I am always having a low battery discharge warning when starting the car each morning. If I park somewhere and keep only the radio on it lasts about 2 minutes max then everything shits down. Seriously no longer than two mins tops.

I have had this for a couple of months now and trying to hold out to next service but thats not for months.......

Surely my radar and dash cam plugged into the ash tray cant be the cause?

As others have correctly suggested time to change the battery AND have the new one programmed in. Make sure the battery is the same type as there are 2 types used in the M3, it will be likely an AGM type which is expensive and should not be substituted. There are some good shops in your location, Josh at Galvsport is excellent. Accessories won't cause this unless they are direct wired to the battery which should never be done.

m3toboot · 08-30-2016, 05:05 PM

Could be a multitude of issues. First thing is to check or have the battery checked. Depending on usage, its often good to use an external charger from time to time.

G80indy · 08-30-2016, 05:44 PM

Two AGM options for programming:
90ah
And a lower setting
--- I think : 70ah

The BMW/OEM replacement is 70ah, less than the 90 ah factory battery.
I suggest you find an aftermarket 90 or 95 ah AGM battery

Scottyvh · 08-31-2016, 04:28 AM

ok thanks - I will take it to Josh and see what he thinks

Scottyvh · 08-31-2016, 04:29 AM

And yes it also shows up with the "Increased Discharge" warning........

solistics · 09-07-2016, 03:10 AM

My battery recently died after about a week of low battery warnings.

I'd been looking to replace it myself and came across all the confusion around the price and coding. When it died, I called BMW Roadside Assist and they replaced the (AGM) battery for $460. Spoke with the mechanic about the coding/price confusion and to quote "you don't need to code if you're replacing with a like-for-like battery". Also confirmed that the stealer price is around $900 and a complete ripoff.

My new battery wasn't coded and has been in the car for a few weeks now with no issues. Save yourself some money and either do it yourself or get roadside assist to take care of it. Avoid the dealership.

JJH · 09-07-2016, 03:44 AM

I respectfully disagree - you MUST have a new battery 'registered'. This can be done at the dealership but any independent BMW shop will be able to do it as well (probably for less ...). This is why > http://carbatteryaustralia.com.au/20...-registration/

The Carly for BMW app can also register a new battery > http://www.mycarly.com/product/bmw-battery-reset/

There are a few threads on this forum covering this issue.

DaveDee · 09-07-2016, 04:39 AM

Quote:

Originally Posted by JJH

I respectfully disagree - you MUST have a new battery 'registered'. This can be done at the dealership but any independent BMW shop will be able to do it as well (probably for less ...). This is why > http://carbatteryaustralia.com.au/20...-registration/

The Carly for BMW app can also register a new battery > http://www.mycarly.com/product/bmw-battery-reset/

There are a few threads on this forum covering this issue.

+1 here Jon, it's required as the discharge and charge rate changes as the battery ages. I agree with you 100% The battery must be "registered" in other words the charging history of the battery is reset so there are no learned charging patterns on a new battery. If you don't register the new battery it will not have the same life.

DBE · 09-07-2016, 03:16 PM

+1

A'PEXi · 09-07-2016, 10:01 PM

Also just a handy tip, if you lock your car after you have parked it, it will ensure that all accessories etc are turned off immediately.

Scottyvh · 09-10-2016, 08:51 PM

Yes - I was told it doesnt shut down properly until locked...

Quote:

Originally Posted by A'PEXi

Also just a handy tip, if you lock your car after you have parked it, it will ensure that all accessories etc are turned off immediately.

A'PEXi · 09-10-2016, 09:09 PM

Anyone know the best place to purchase a battery and have the programming done in Bris?

Don't need it at the moment but good to know for later

08-30-2016, 09:58 AM	#1
Scottyvh Enlisted Member 9 Rep 41 Posts Drives: 2011 E90 M3 Pure Join Date: Dec 2015 Location: Perth, Western Australia iTrader: (0) Garage List 2019 M2 Competition [0.00]	Low Battery Discharge I am always having a low battery discharge warning when starting the car each morning. If I park somewhere and keep only the radio on it lasts about 2 minutes max then everything shits down. Seriously no longer than two mins tops. I have had this for a couple of months now and trying to hold out to next service but thats not for months....... Surely my radar and dash cam plugged into the ash tray cant be the cause?
	Appreciate 0 Tweet Quote

08-30-2016, 10:01 AM	#2
mazing M3 Private First Class 16 Rep 130 Posts Drives: E93 M3 Join Date: Nov 2014 Location: Mass iTrader: (0)	Its time to change the battery.
	Appreciate 1 BanjoPaterson160.50 Quote

08-30-2016, 12:02 PM	#4
dichoi Private 14 Rep 69 Posts Drives: 2012 E92 M3 Join Date: Jan 2016 Location: San Diego iTrader: (1)	I had an increased battery discharge warning as well. Changed the battery and had it reprogrammed, but I'm still getting a warning. Only thing I can think of is that it may be an alternator issue, or they messed up programming it. Going to get it checked out next week. Will keep you posted
	Appreciate 0 Quote

08-30-2016, 05:05 PM	#6
m3toboot Private First Class 24 Rep 159 Posts Drives: ///3 Join Date: Jul 2015 Location: Sydineeeeeeee iTrader: (0)	Could be a multitude of issues. First thing is to check or have the battery checked. Depending on usage, its often good to use an external charger from time to time.
	Appreciate 0 Quote

08-30-2016, 05:44 PM	#7
G80indy Save the Manuals 1714 Rep 2,937 Posts Drives: Z3, E46, G80 Join Date: May 2005 Location: Indy iTrader: (0)	Two AGM options for programming: 90ah And a lower setting --- I think : 70ah The BMW/OEM replacement is 70ah, less than the 90 ah factory battery. I suggest you find an aftermarket 90 or 95 ah AGM battery __________________ 2023 G80 6MT, CCBs 2002 330i Dinan, 5MT 2000 Z3 Conforti, 5MT
	Appreciate 0 Quote

08-31-2016, 04:28 AM	#8
Scottyvh Enlisted Member 9 Rep 41 Posts Drives: 2011 E90 M3 Pure Join Date: Dec 2015 Location: Perth, Western Australia iTrader: (0) Garage List 2019 M2 Competition [0.00]	ok thanks - I will take it to Josh and see what he thinks
	Appreciate 0 Quote

08-31-2016, 04:29 AM	#9
Scottyvh Enlisted Member 9 Rep 41 Posts Drives: 2011 E90 M3 Pure Join Date: Dec 2015 Location: Perth, Western Australia iTrader: (0) Garage List 2019 M2 Competition [0.00]	And yes it also shows up with the "Increased Discharge" warning........
	Appreciate 0 Quote

09-07-2016, 03:10 AM	#10
solistics New Member 1 Rep 27 Posts Drives: 2012 E92 M2 Join Date: Jul 2007 Location: Melbourne, Victoria iTrader: (0)	My battery recently died after about a week of low battery warnings. I'd been looking to replace it myself and came across all the confusion around the price and coding. When it died, I called BMW Roadside Assist and they replaced the (AGM) battery for $460. Spoke with the mechanic about the coding/price confusion and to quote "you don't need to code if you're replacing with a like-for-like battery". Also confirmed that the stealer price is around $900 and a complete ripoff. My new battery wasn't coded and has been in the car for a few weeks now with no issues. Save yourself some money and either do it yourself or get roadside assist to take care of it. Avoid the dealership.
	Appreciate 0 Quote

09-07-2016, 03:44 AM	#11
JJH Major 546 Rep 1,107 Posts Drives: IB E92 M3 DCT; SG E90 325i Join Date: Nov 2012 Location: Canberra, Australia iTrader: (1)	I respectfully disagree - you MUST have a new battery 'registered'. This can be done at the dealership but any independent BMW shop will be able to do it as well (probably for less ...). This is why > http://carbatteryaustralia.com.au/20...-registration/ The Carly for BMW app can also register a new battery > http://www.mycarly.com/product/bmw-battery-reset/ There are a few threads on this forum covering this issue. __________________
	Appreciate 0 Quote

09-07-2016, 03:16 PM	#13
DBE First Lieutenant 31 Rep 308 Posts Drives: 08 E92 M3 Join Date: May 2012 Location: Brisbane iTrader: (0)	+1
	Appreciate 0 Quote

09-07-2016, 10:01 PM	#14
A'PEXi Lieutenant 70 Rep 477 Posts Drives: M3 Join Date: Aug 2009 Location: Australia iTrader: (0)	Also just a handy tip, if you lock your car after you have parked it, it will ensure that all accessories etc are turned off immediately. __________________ CORSA CS
	Appreciate 0 Quote

09-10-2016, 09:09 PM	#16
A'PEXi Lieutenant 70 Rep 477 Posts Drives: M3 Join Date: Aug 2009 Location: Australia iTrader: (0)	Anyone know the best place to purchase a battery and have the programming done in Bris? Don't need it at the moment but good to know for later __________________ CORSA CS
	Appreciate 0 Quote