Passenger seat occupancy sensor emulator.

Upgrading to seatbelt triggered seat or any kind of aftermarket seat will result in permanent “airbag” illumination on your dash.
Even if you clear the error code, it will came up few seconds after the car is started and that’s because your occupancy sensor isn’t plugged in.

All you need to do is cut the oem seat connector (bottom) and solder the cables to this emulator (top) . Black to black, blue to blue (if you have any doubts) and plug it back in.
Car will be “fooled”, airbag light would shut off ( after you clear the error codes) and in case of an accident airbags will be deployed. The best of both worlds.

It would work for e36, e46, e39, e38, e83 and e53.