it is ridiculous I had the issue on my BMW and no sensor available. therefore the resistor fix. if you can still get the sensor it is fun to disassemble the seat. make sure you disconnect the battery before you start if you don't it sets a hard code and you need a scanner to turn it off. Also, you don't want the side airbag to go off when you remove the seat.
DETROIT - General Motors is recalling about 109,000 Cadillac CTS models from the 2005-2007 model years because of a kink, bend or fold in the front passenger presence system mat that can lead to the passenger air bag failing to deploy.