Keyfob

[grumpywurzel]

[quote="X5Sport"]
E53 keys inductively recharge when in use.  There is a ring around the ignition switch that does the job.

I would expect the earlier build ones will now have cells nearing end of life.
[/quote]

Cheers bud, just dug my spare out after reading this, not used it in a year or so and luckily it works fine. Had a brand new key paired when I bought the car and tbh that's the one I have tended to use!

Must try and cycle them more frequently!