I have just picked up my 2002 172 from a 36k service and found that they couldnt change my aux belt due to a cracked pulley. I think this will be expensive!!! I rang Renault specialist in Nottingham and they told me that I had to buy alternator and pulley as one part. Is this correct? Also they said this was a common fault across the range!!!Any ideas? I was quoted £315 by a small garage(aux belt, new pulley and 2hrs labour)