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Hi:

I'm new to forum. I have a 2016 mini cooper countryman S (park lane edition). The battery is dying. Local mini dealership is asking almost $400.00 to replace with only a 24-month guarantee. Local Pep Boys has replacement with installation for around $200 bucks with 3-year replacement. Dealership told me that the battery has to be reprogramed and they would advise bringing it to a local service provider due to this issue. If anyone has any knowledge, input or advise, I would greatly appreciate it.
 

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yep the battery must be added to car ecu with diagnostics tool, otherwise it will not charge right the ecu controls the charging and must know what its trying to charge. snap on diagnostic tool with European bmw/mini software update will do it, i would think if in the us there are battery specialist worth contacting them they might have the diagnostic to mount the battery,, failing that bmw software insta d on ebay around £100 for full and latest, if your car was before 2015 then autocom cdp plus would do it but dont think it covers the latest spec cars as yours is
 

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So would there not be a way to make the car think the battery has never been removed by attaching another 12vdc source while disconnecting the original dying battery. And then install the same type AGN battery. I would think that would trick the system in some way and avoid an expensive trip to the dealer. Not sure what group size is in my 2016 Countryman (BMW 760CCA) but Advance Auto has every size for Mini Coopers.
 

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So would there not be a way to make the car think the battery has never been removed by attaching another 12vdc source while disconnecting the original dying battery. And then install the same type AGN battery. I would think that would trick the system in some way and avoid an expensive trip to the dealer. Not sure what group size is in my 2016 Countryman (BMW 760CCA) but Advance Auto has every size for Mini Coopers.
all the system would of learnt is a failing battery ie demand all the time as wont meet the storage
 

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Not sure what that means Mike:confused: Since the just purchased 2016 that DW got has the original battery, I was thinking of replacing it (4 year old BMW AGM). That is usually the expected life of car batteries down on our warm Texas coast. On the trucks I've owned, a battery replacement is simply remove, install new one and then reset the clock, radio presets, etc. No weirdness with ECU controls, etc. They all get a reboot. If what you mention about adding to the ecu with diagnostic tool, then not allowing the 12vdc to disappear would trick it while the battery is removed and replaced. The radio presets, clock and ecu would never know the battery was taken out. Now on the other hand, if stevemo's battery has completely died, that is altogether a different matter and what you mentioned may apply.
 

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Found a full series of similar AGM batteries for ~$200. Looking over the setup, I think I can do the install and a European auto service near me will do the "coding" of the new battery for $85. Seems somewhat outrageous $$$. In all the trucks and cars I've owned including a 2017 Ram Limited 3500 dully, I've never heard that a car cannot program itself to charge the battery correctly. I would normally consider only replacing a battery when fails but it appears these are so sensitive that it might be wise to not allow this AGM to go past 60 months. Nothing on my BMW battery indicates a date of any kind.
 
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