Need Help Finding Part # for Pulleys

[RuskiE39]

Hey All,

The other week I ordered a new serp belt and idler pulley for my M62 X5, however, the pulley I got is larger than the ones currently in the car. I followed the RealOEM parts diagram and ordered the following part #: 11287500560 as shown in the diagram below.



This is what I ended up getting:



But this pulley is too big to replace the one currently on the engine.

I'm trying to replace the 2 pulleys shown here to eliminate the bad bearing squeal.



Anybody have the correct part number or know what i'm doing wrong?

P.S. There is coolant and oil spillage because I had just finished up replacing the timing cover gaskets.