When purchasing my '05 back in '09, I presented a list of repairs needed to seal the deal, this of course after my mechanic and I inspected the car. One of the things on the list was to repair the passenger seat which did not heat up. I was told afterwards that it was the single most expensive repair made on my list and it turned out to be some module with a dealer part price of around $500. I was told it was a module found somewhere behind the dash....I didn't ask any questions, nor did I care...it was fixed is all that mattered at the time.