2032 Battery you need – https://amzn.to/3ZO22Go
Here is a quick and painless demonstration on how to change your dead / weak battery in your i3 key fob. You do not need any tools just a fresh 2032 coin cell battery. Hope you found the video helpful! Take care
BMW 2014-2020 i3 i8 SMART KEY REMOTE FOB FCC: NBGIDGNG1
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2032 Battery you need – https://amzn.to/3ZO22Go