Don’t waste your time trying to repair the OEM heater

Just get the heat pad that can be cut to size and solder it in the the existing harness. It’s really easy to do but the seat needs to come out and the upholstery needs to be pulled back

The pads are available on EBay (i know I have the box from the pads I’ll check my parts bins tomorrow). I believe there are a few posts about this on the forum and a few replacement DIY videos on YouTube