I have only 1 key so thought I would get a back up -
Timpsons could cut one for £50 that would open and start car but they were unsure if alarm would disarm.
BMW dealer - Basic key which will unlock, start and disarm alarm - Around £38 all in, so I ordered. A fully functioning remote key would be around £135 all coded.
I asked what situation would be if I lost all keys - Simply go to dealer and order a new one which would be available within 1 or 2 days. No real issue at all then - You need your V5 document and photo ID with same address as verification.
I hope that helps clarify
