BMW M57 X5 Pulley Noise

Sounds like a bird chirping on start up. This was resolved by replacing harmonic balancer, alternator pulley, and water pump. My guess is the noise was being caused by the alternator pulley.

[@kristapsjurgenbergs6622]

Noise 102 % is from crank pulley, i had the same ptoblem, only 10times more sqeek and all the time!

[@mikey85201]

Did you ever find out the problem

[@-Drein]

Did the sound increase when you accelerated? And did the sound go away after driving for 10-15 min?

[@Vierhas]

Did you find out the problem, i have it in my e39 530d

[@-Drein]

@@Vierhas yes. My harmonic balancer was cracked