4 mo old z110bt 2 weeks ago the unit stopped recognizing anything usb that was hooked up to it and lately most of the people iv talked to through bluetooth were saying they heard static in the background. so i borrowed a new microphone and usb terminal from one of my friends who just purchased a new z110bt to find out if mine had gone bad and surprise surprise ipod works again and calls are crystal clear. pioneer sells these replacement parts for $50/each on their website but i wonder if they'll send em to me for free if i call em up as my unit which they came with is under warrenty

Anything that comes with the unit is covered by the same warranty as the unit. You will likely need to send the dead part back before they will send you a new one. That is, if you purchased the unit for an Authorized dealer.