yes it used to be covered under emissions warranty even if they were salvaged/rebuilt/flood tittles, I know cause I had more than a few covered in the early and mids 2000, then something changed and they started to void warranties , most dealers and independent shops wont even touch them now a days, specially flood damaged. we have a new one now also lightning strikes damaged, making them salvage tittles on some high end vehicles probably for the amount of modules that need to be replaced.