Hi,
Today my 2009 Q5 surpentine belt fell off without any warning. Took it to the dealership service and I received recommendation to replace A/C compressor with pulley, power steering with pulley and the serpentine belt all of them together.
Is this a common diagnosis ? It seems excessive ? The car only about 45k miles on it and has all the regular maintenance done. No issues prior to this problem.

Secondly does the A/C compressor with pulley cost about $1900 ?
Power steering with pulley cost about $700 ?

Thanks.