[Dim718]

So finally my car didn't start on me today , for about 2 months now I've been getting a message that something is causing my battery to drain. Fellow friend who has the exact same car had the exact same issue stated its the jb4 making the water pump run non stop , now i can't get in touch with that person to tell me how he fixed this issue does any one know what i can do pleaseeee help!!!

[BavarianFanatic]

I have a '13 335i with a JB4 and I haven't had that issue. I HAVE had excessive drain messages on occasion, but not frequently and usually after not driving the car for an extended period. Are you running the most recent version? Have you contacted Burger?

[Dim718]

Originally Posted by BavarianFanatic

I have a '13 335i with a JB4 and I haven't had that issue. I HAVE had excessive drain messages on occasion, but not frequently and usually after not driving the car for an extended period. Are you running the most recent version? Have you contacted Burger?

Yes I just emailed burger now
And I'm not sure what software I have as I bought it Installed it THATS it

[Ehodzic6]

Originally Posted by Dim718

So finally my car didn't start on me today , for about 2 months now I've been getting a message that something is causing my battery to drain. Fellow friend who has the exact same car had the exact same issue stated its the jb4 making the water pump run non stop , now i can't get in touch with that person to tell me how he fixed this issue does any one know what i can do pleaseeee help!!!

Is this for a n20? I have the n20 jb4 and my battery is perfectly fine. Strange that this is happening.

[r33_RGSport]

Do you have other things aftermarket connected to the car? Such as; P3Cars gauge, OBD2 reader, etc?
I have been running BMS Stage 1 and JB4 Stage 2 on all of 3 of my cars and no battery issues.
The first time I encounter battery issue was because of the P3cars gauge that was flickering right after I lock the car and draining the battery.
Good thing the car closed the OBD2 port circuit and stop the drainage. I noticed that when I returned to the car and the CA stop working.

[Dim718]

Originally Posted by r33

Do you have other things aftermarket connected to the car? Such as; P3Cars gauge, OBD2 reader, etc?
I have been running BMS Stage 1 and JB4 Stage 2 on all of 3 of my cars and no battery issues.
The first time I encounter battery issue was because of the P3cars gauge that was flickering right after I lock the car and draining the battery.
Good thing the car closed the OBD2 port circuit and stop the drainage. I noticed that when I returned to the car and the CA stop working.

no only mods i have is a 4"inch down pipe jb4 and a m lip lol
nothing that would eat the battery. i found out from people that its because the water pump doesn't shut off and its running non stop thats what eats away the battery, haven't found how to fix it yet. but youtube has some video which is impossible to understand on how to fix it

[Mike_L]

Originally Posted by Dim718

no only mods i have is a 4"inch down pipe jb4 and a m lip lol
nothing that would eat the battery. i found out from people that its because the water pump doesn't shut off and its running non stop thats what eats away the battery, haven't found how to fix it yet. but youtube has some video which is impossible to understand on how to fix it

I think whoever told you that is wrong. I've never heard of the JB4 running the water pump at all. How could it? I think Burger will tell you the same.

[Dim718]

Originally Posted by Mike_L

I think whoever told you that is wrong. I've never heard of the JB4 running the water pump at all. How could it? I think Burger will tell you the same.

its really annoying but i know its not just the battery cause i got a new one and the same thing happened after a few days. if i don't turn my car on at least 1s a day it won't start the 2nd day already.

[obriennathaniel]

never heard of that before lol. ive never had any kind of battery drain issue or anything. get a multimeter and see if the jb4 is drawing any current while ur car is off

[r33_RGSport]

Where does the JB4 red wire connected to?
JB4 does let the waterpump to open and close more often than stock to maintain the temp. But that shouldn't cause the battery drain since it won't doing it when the car is off.

[Jeff@TopGearSolutions]

Only way to really blame the JB4 is to remove it and see if the problem persists. I'm assuming you checked the wiring on the JB4 by now and updated it to the latest firmware via USB?