I went to few machanics and all said that the noise is comming from either alternator, pulley, or ac compressor bearing. is anyone familiar with this problem? which one out of three can it be? one machanic said that it's an ac compressor bearing and it will cost anywhere from $500 to $600

 

i have a bearing noise as well, mine is from the ac compressor. pretty sure mine is not the bearing but the clutch. but no one sells just the clutch