[trollbridge]

There are, and I got cursed with a BMW that uses one of them. Eventually after 10+ years it finally dies, and it's basically impossible to replace and actually make it work again, so I just have to replace the 2032 in it every few months.

[F7F7F7]

My Dad shipped a M car overseas a decade ago. The is fine. The keys are dead.

Since the islands he now lives on has no BMW presence they want him to ship the car back to get new keys.

[fragmede]

FWIW, there's https://a.co/d/gOk1RkB which takes an airtag and AA batteries, and should need replacement in 10 years. Unless they make BMWs a lot smaller where you are, you can fit it somewhere. Now I just need a retailer that sells speakerless airtags.

[lxgr]

Oh, is that what they use in their wirelessly recharging key fobs? I've always wondered what happened if the car were to outlive the key.