I have copy of the MB-WIS but for some reason it won't install on my new computer so I am hoping somebody can help identify a part and give some advice on what to do about it.

The problem is that when I start the car, I get a high pitched sound which I think is the serpentine belt rubbing against a frozen pulley. The offending part is at the left most side of the belt path (passenger side) and looks to be attached to a pump or something like that. It might be electrical since the ABS and traction control idiot lights are illuminated, and the owner's manual says something about a low voltage condition, but it doesn't look like an alternator to me since there are no cooling vents on the piece.

I assume the pulley should be more or less perpendicular to the shaft, but it seems to be cocked to one side by 5 degrees or so, which suggests that the bearing is shot. Should I replace the whole unit or can I just replace the bearing? It doesn't look like a huge problem to get to it but I would like to know what it is so I can get the right part on order and I don't think it is a good idea to drive it to the dealer in its present condition.