What went wrong? Have you registered the battery yet? If not read the very last paragraph in the info in post #16 in the section under REGISTER BATTERY? It says what can happen if the battery is replaced and not registered ("power management may not function properly, with results CHECK CONTROL may be displayed...").

Additionally looks like there was a swap from Lead Acid to AGM and from 90AH to 95AH, both of these may or will need to be updated when registering the battery.
Someone with carly battery coding should be able to chime in if this is a change that carly easily facilitates. Ista+ asks for new battery details when registering.

I was told that battery registration can be done sometime later, in a week. I am on next to order a Carly and its hook-up device.

1. Did you change the TYPE or SIZE of battery? REGISTERING later is OK, changing other things no. Looking at the pictures it seems it is an AGM for AGM, so that's ok...and the 90Ah vs 95Ah is perfectly fine too. A 5% difference is in the noise. Internally they are probably identical, made by the same factory I'd bet.

2. Was the new battery fully charged? Did you drive/let it charge for 2-3 hours after install? Taking a battery that has been sitting for months on a shelf may be installing a borderline unit

3. I'd attach an AGM charger and charge it overnight

1. The owner (a family friend) of the X5 took the vehicle to a local AutoZone store, asking to replace the battery (which the store would do for many other cars). The store clerk said that they could not install a new battery for BMW vehicles. So they brought the replacement battery (from AutoZone) home and asked me for help (since I replaced WP/thermostat and breaks on the vehicle before). I then asked for advice on this Forum about precautions of replacing the battery, and was told that battery registration can be done afterwards, within a week or so. So I went ahead and replaced the battery, and later got the surprises of Yellow warnings.

2. The new replacement battery has a 09/17 time stamp on it. I did not check the charge capacity of the battery as I don't have equipment to do that. I had no problem start the engine after battery replacement, just the Yellow warnings. What do Check Engine and Break warning lights have to do with Power Management issues affected due to a yet-to-register replacement battery?

3. I have a regular/standard battery charger by Sears Craftsman. Would this charger work with an AGM battery?

When you disconnected the old battery it reset the computers. The dsc computer needs you to reinitialize it by this:
Start engine.
Turn wheel all the way to right,
Then turn wheel all the way to left.

Acknowledge the errors in idrive etc, they should be gone by the next restart of engine.

Just saying this because a year ago I changed from factory agm to a lead acid battery and that's what cleared the errors. It was a week later that I was able to recode to 90ah lead acid. The not coding is not what causes the errors! But what did do it was swapping the battery , disconnecting power makes modern bmw's go crazy.

Did you turn it off, restart? A few times? Drive it? anything?

Tells us nothing

Dont need to.



("Brake"....)

Nothing. Likely some odd power glitch causing modules to throw errors-a low battery charge state when starting the car can do it.

It is my opinion that the registration issue has nothing to do with these error...


Id guess no, but you should check the manual with your charger- I cant see it from here....

Just to share my experience here:
I bought the car in Oct. 2016. Soon I got dsc, 4x5, abs,... errors. Lots of drivability issues. It was annoying. Turned out it was the result of low voltage. Battery was barely 1.5 years old. But ... the battery was 80 Lead Acid and NOT CODED. Original battery (coded to the car) was 90 AGM. Changed the battery and issue was gone forever!


If changing the battery type (agm to LA, or the opposite), coding and registration is ABSOLUTELY NECESSARY. Else enjoy chasing odd issues.



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Thank you for all the advice. Here is the label on the old BMW battery. I don't see any TYPE code on it. The new replacement is of AGM.

My Sears Craftsman car battery charger is over 20 years old and I don't have its manual around. I would guess at it's time, AGM battery was not invented yet so I doubt the manual would say any thing about charging AGM batteries.