2004 Toyota Sienna electrical system problems

In early january 2011, the heater for the passenger car seat in my toyota sienna burned through the leather, through my 12 year old daughter's dress and superficially burned her leg. I believe the seat is defective as a fuse or other safety feature should have prevented such an injury/event.

Power sliding door cable snapped and children in back seat cannot ride safely, as door will not operate properly. Spoke to toyota, opened a claim, was told the warranty enhancement notice was issued, but although I wasn't over my mileage, I was over the date of 1st use of vehicle. They extended the warranty for this faulty part for 9 years, 120,000 miles. My vehicle sat for 8 months as well when our other toyota, the tundra had its frame replaced...but even though they still will not help.