I found the release and Toyota says, Based on 2004 data and a truck population in excess of 81,000 SAS has experenced a 99.77% reliability rate. They also state that for every 1000 trucks less than 3 of those trucks had an issue. This is based on warranty claims on file and parts sold to dealers from 1999 thru the end of 2004. This is on SAS part numbers and SAS warranty claims. This was released in August 2005