Changing the compressor is an easy task. The compressor is right there on top held by three bolts. Easy diy. However the part is the one that confuses me. When I look at the Denso catalog 2009, 2011 and up seem to have a 471-1325 compressor but if you put 2010 they don't have it in file. Looking at the porsche catalog it says 9a112601102 and it has Denso number 4471500085. These compressor are priced from a reasonable $300 to a ridiculous $1300 for the oem. I will pull the compressor down eventually and get the model but is the 471-1325 the latest version? It's priced at $300. Is there any difference between the 4471500085 and the 4711325?