Fly, if you can post pictures of your seat bottom that would be great. If the pad is sewn to the leather, it should be able to be un-sewn? The question is, how can the broken wire be found and repaired? this guy did it on an F-10: https://www.youtube.com/watch?v=tggE...channel=sysell

As a last resort, the heating pad can be disconnected and a replacement generic pad can be placed, although the seat bottom only will be heated. This post described it: https://www.xoutpost.com/bmw-sav-for...ement-diy.html

A follow up post described using a Range Rover pad that heats the entire seat: https://xoutpost.com/bmw-sav-forums/...nt-repair.html

Unfortunately neither has pictures, so if you do this repair please post.

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Mark
2001 3.0 Original Owner, still going
2012 E70 xDrive 35i Pre-Owned -- sold because no one could figure out the transmission problem