I'm new to BMW and not much of a mechanic. How do you loosen the A/C compressor to remove the belt? Is the idler adjustable? The only visible bolt on the compressor seems to mount it to a bracket but does not allow for any movement of the compressor. Any input would be greatly appreciated. Thanks.

Im not 100% sure but it youw ant it off you can just cut it. It might snap back and hit you but it wont be life threatening.