Battery Bosch or OEM BMW
The battery on my previous F20 lasted over 12 years before I replaced it last winter. Had enough voltage but bad resistance readings, mechanic advised me to change it for the winter.
I’m just over 10-years on my ‘15 M235i.
I got 12 years out of the original battery on my E90.
My e93 Battery Laster from 08 and I replaced it this year due to it started having Problems. It still kinda worked but I didnt want to have Problems. Still 17-18 years on a battery is bonkers
Changed my battery this year on my 2005 e46 coupe. There wasn’t a date for the old one, but 3 codes and for one (H1B582092) ChatGPT said that it’s 2005 battery, which just sounds insane if true.
I still have oem in my 3 series from 2015 !
I had 8 years on original battery on 2017 750i. I replaced it. It was barely holding 12V. Few functions were not working like stop/start and such.
I also just had a new battery installed by BMW, $600 for the honor.
Dealer measured my 2021 m340xi battery at 700cca last week under load test (vs 850 cca capacity) and said battery needed to be replaced. Terminal was stamped 26th week of 2020.
I bought a brand new Bosch battery last year ( not Halfords)and when I checked the voltage it was less than 10 volts so there are dud batteries out there.
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