Something may have caused it to blow - but standard practice is to replace the fuse. If it then blows again, then find what's causing it. Fuses, like light bulbs, don't last forever and it's a good chance IT was the failure.
Wanted: Dead, smashed, crashed or trashed gauges
BMW GAUGE REPAIRS - TACH*SPEEDO*CLOCK*VOLT METER *PODs & LIGHT BOARD*