Some progress on the interior finally. After picking up two very nice comfort seats from 5s0NG and shipping them to New Orleans last week, I spent the morning stripping them of plastic bits, controllers, etc. and dropped them off at the upholstery shop along with the uberkaro fabric for the inserts and the new seat bottom foam pieces.

I ended up doing the right (non lazy) thing and swapping the drivers seat in to my car just to make sure it would work. 5s0NG’s car is a 2006 3.0 sport and cold wx package car. Interestingly, while they seem to be “comfort” seats, the backs of his seats are several inches taller and they have heat, lumbar and adjustable head rests. Sport package maybe?

Hapiliy I can say that it all works great when plugged into my 2002 harness, which is a relief. The only thing I couldn’t test was the heat, but I’m hopeful that will work too as soon as the eBay console switch with heat buttons shows up and I sort out what relay and/or fuse(s) is are needed. I think there is a rear fuse block relay for heated back seats, according to the inter web, and I can see wires going up into the relay plug, but no relay is installed. I’m not finding a relay for front seat heat, but may be overlooking something or the fronts use the same relay as the rear seat.

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Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee