The housing and crimps are AMP parts ( Part of the Tyco group, which then became TE). These parts are ‘owned’ by BMW and are not available to other distributors. I did try to get some for mine when I did a heated seat retrofit, but impossible and BMW wont sell them either.
The heat pads I bought came with lots of wiring, relays switches and connectors that I didnt actually require, so I cut off the 4 way socket under the seat and soldered on some of the crimped wires from the parts supplied and ended up with just one 4 way connector under each seat to keep it all neat. All works well and had no problems.
I have one pair of the 4 way and lots of two way left over. The crimps are easily removed from the housings so could be matched up to give you plug and socket mating halves.
You are welcome to them if they are of any use to you.
Just thought about this and I have assumed it was the heated seat connectors....if it the wiring to the motors and seat adjuster switch, the you might find one of the breakers could help (
@spurs fan in a coupe ,
@Synclare or
@mrscalex )