Water pump pulley wobbling/squeaking
 

I believe that my squeaking may be caused by my water pump pulley.
With the engine idling, there is a screeching and the pulley in item #10 in the RealOem diagram is slightly wobbling.

Is it just a removal and replace? anything needed to be done to the water pump also?
RealOEM.com * BMW E53 X5 4.4i Waterpump - Thermostat

First, I'd make sure that 4 bolts that hold the pulley to WP shaft are not loose. If not, grasp the pulley and try to move it back and forth. There should be no play. Obviously, do all this with engine off.

Also, while engine is running, VERY CAREFULLY put the tip of stethoscope on base of WP body behind the pulley and listen for noise. That way, you'll know for sure it's WP or not, as the sound could be coming from other sources.

If WP is bad, it all depends how many miles, what's been replaced already and how long you plan to keep the car, in order to decide what else to replace.

yeah... its the water pump. there is play and the screeching is definitely coming from there.