I've just started noticing the odd small 'click' coming from my drivers seat when cornering hard. I suspect I have this same issue.
I'm out of warranty but will be pushing extremely hard to get this fixed for free. Surely there's quite a large safety issue here if the seat isn't securely attached to the chassis. In a large impact, if the seat becomes detached presumably it could render the other active safety devices (air bags, seatbelt pretentioners etc) ineffective, or even hazardous in themselves?
Am I the only one to think this should be a recall, not just a service bulletin?