Agree with other posters that it is normal. However, be aware that the temp gauge is not indicating the real (relative) coolant temperature. The gauge is buffered on BMWs. What happens is that if the temp is anywhere from just off cold to just below overheating, it is adjusted to the centre position. That is why if and when it overheats, posters often remark that the gauge went from normal to 'pegged to the right'. It really only has three accurate readings: when the engine is completely cold, normal temperature, and overheated. At any other variation, it is programmed to show dead centre on the gauge.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue