My driver seat bottom (only) does not work on my 04 when I bought it used. It is almost guaranteed your seats will fail. I saw a plug in quick heat pad for around $30 a few years ago and should have bought it. You have to remove the seats to properly repair them and the costs for those Chrysler kits is around $100. I'll live with a cold butt!

This is definitely a design or equipment faiiure problem that should have been a recall even if out of warranty!