Turn of the airbag light
Hey, my mate had a problem like that, with the airbag light beeing on, just in a Mini, he went to a garage and they told him the sensor in the passenger seat was broken, and the entire seat needed to be changed, costing around 2.250$. He searched a little around and found an airbag emulator, that gets your system to think someone is always seated. In case of an accident the airbag will ALWAYS go off, on both driver and passenger seat. He found it on amazon: http://www.amazon.com/gp/aag/main/ref=olp_merch_name_1?ie=UTF8&asin=B00E3C1IPW&isAmazonFulfilled=0&seller=A3VPDTQ49IXC7U - it is a quick fix, but a solid one.