I've got a buyer waiting to come and look around my old car but I broke a coil spring the ONE time I used it since April. Have all the bits ready but haven't had time to do it for 2 weeksShelled out 70 notes for a new battery yesterday. Which wouldn't usually be annoying except for the fact that it's up for sale.
At least I can tell any potential new owner they wont have to worry about it for a while.
I was told the BMS will self learn within a day or 2 when I was searching on the Polo forum. Seems it’s not quite as clear cut but neither would I be overly worried.It does. New batteries have a diff charging profile to aged ones. Nothing to do with warranty.
Most car manufacturers, as well as BMW, work with an open system, i.e. the independent aftermarket can install a suitable replacement battery without having to reprogram the vehicle electronics. However, manufacturers such as Audi use a closed system and assign so-called BEM codes for original batteries and original replacement batteries. The independent aftermarket is not able to provide this kind of code for replacement batteries!
PS: In Volkswagen Group repair workshops (Audi, Seat, Skoda, VW), calibration takes place via a guided function of the online diagnostic and information system (ODIS Offboard Diagnostic Information System). Data such as the BEM code, serial number and nominal capacity of the new original replacement battery are entered. In this way, the energy management system knows immediately that a new battery has been installed. The Volkswagen Group is currently able to enter any 10-digit serial number. The VW serial number is used for tracking the battery and for warranty purposes.
I did some quick Google searching on Carista and it looks like it can do it for some cars but didn't find any mention of it with BMW. Fortunately I managed to get hold of a piece of software and have done it myself. Now to go back to Halfords and have a brief moan that I had to finish the job myself. If I'd known I'd end up messing around doing the battery registration myself I would've done the whole thing myself since that's the only part I wanted to avoid.
Still, at least I'm sorted if I ever need to do it again on either my car or my wife's.
I don’t even think you can change the profile from EFB to AGM at least Carista didn’t give me the option. From memory you can enter the manufacturer and that was only 3 characters, the capacity and a s/no which is literally just for warranty purposes. Ideally you should be replacing like for like but the cars BMS should self learn in the same way the ECU does for fuel ect.Halfords replaced my failing EFB Battery with an AGM Battery.
I did ask the question's about ensuring it is coded in correctly which he said it would be, he did plug an ODB device in and do some coding but when I asked if he could ensure the car battery type is changed from EFB to AGM he said he was unable to do that but they have "Similar" charging rates and would be fine which I accepted with the intention of having this double checked, seems poor really as most people will just take there word for it.
When my car was in with VW for something un-related they did perform a battery adaptation for me free of charge so I am much more at ease knowing everything is coded correctly.
I don’t even think you can change the profile from EFB to AGM at least Carista didn’t give me the option. From memory you can enter the manufacturer and that was only 3 characters, the capacity and a s/no which is literally just for warranty purposes. Ideally you should be replacing like for like but the cars BMS should self learn in the same way the ECU does for fuel ect.