Here are the steps for alternator replacement of BMW X5
* Remove the drain plug on the driver's side bottom of the radiator
* Drain the coolant and remove the coolant hoses
* Loose the belt tensioner
* Unhook the battery +/- connections
* Unbolt and remove old alternator
* Take the wires off the new alternator
* Clean area where alternator goes, bolt the new alternator inside
* Reattach coolant hoses and refill system with coolant
* Put the intake tube and duct back on.