Freddy and all of you having this issue should read this.
It's the thermostate stuck open/close issue. 'no heat' is caused by coolant not getting circulated in the engine. When you turn off the engine and turn it back on it helps release the pressure built up and open/close the thermostat again making it work. Get your thermostat replaced and flush the coolant you will be good, and you are looking at $50 thermostat + $125 labor + $75 coolant flush = $250. Switch on and off is the temporary fix.

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2002 X5 3.0 Siena Red
Premium, Cold Weather, Rear Climate Packages, 19" Wheels
Aluminum Running Boards, Clear Tail Lights, Clear Side Markers
Titanium Kidney Grills, Titanium Trunk Lid, Xenon Headlights
4.6is X5 exhausts, 35% Tint, Aluminum Pedals
2005 530I Mystic Blue
Premium Package, Sport Package, Xenon Headlights
18" Sport Wheels, 35% Tint all around
Mods to come: M-Tech Front Bumper, M5 Side Skirts, M5 Rear Bumper
Quad Exhausts, Style 172 19" Wheels