I have a 2004 Z4 3.0 that is still covered under the CPO. I just got finished changing the oil and filter and had the Z idling while checking for leaks (none!!). I noticed that the alternator or possibly the idler pulley right next to it was making a fairly loud noise - most likely bearings going bad. So, the question is - is replacing the alternator or idler pulley covered under the CPO? Thanks.