The coolant for a BMW x5 is placed into the coolant overflow tank on the left side of the engine compartment. It should be filled to the full mark when the engine is at operating temperature.
the wet kind
Anti freeze 50/50
below the coolant tank in a black cover.
The water and coolant is put in the coolant reservoir for the location of this refer to the owners manual. It is best to do this when the engine is cold otherwise you run the risk of getting boiling water all over you. the mixture of coolant to water should be about 50/50.
A 2006 BMW X5 is the first generation E53 X5.
I have put on 2 alternators on my x5. One at 125000 and another at 160000. They are internal and rub in engine coolant. They get much hotter than most average cars that are air cooled.
where it says "ATF" on the cap
The 2014 BMW X5 has 24 valves.
The 2011 BMW X5 has 24 valves.
The 2005 BMW X5 has 24 valves.
The 2009 BMW X5 has 24 valves.
The 2006 BMW X5 has 24 valves.