You should ask your BMW Dealer, if you like to do that. The problem needs a little bit more attention. You need a new IKE, some wiring harness, a cooling fluid sensor and some time to install it. Then BMW have to code it to your car.

After that, everything in your navigations system should work (clock, date, arrival time, memo, language, bordcomputer).

And: don't buy a used IKE. It's impossible to code it twice.