(thumb)For those who have to replace their primary 02 sensor due to damage during downpipe installaion the replacement part number is 15782 Bosch OE Identical Oxygen Sensor. After looking around you can grab it for anywhere from 330-220. Autozone & Amazon. I knew there were a few others and wanted to give an alternative compared to the dealership. If anyone else knows parts numbers and locations/ prices i encourage them to post here.