Z4 recently acquired after years of standing, airbag light on owners scanner wouldn't reset it. Full Health Scan using my Launch Scanner showed up drivers seat belt pretensioner high resistance. Code cleared and light went out, cycled ignition a few times and it stayed off. Will have to see if it stays off or comes back after a few driving cycles. If it reappears then pretensioner will be changed. Quite a few historic codes also showed up and were cleared and didn't come back. Bodywork looks ok for a car that was left standing. Going to clean up very well by the look of it.