Peugeot 307 1.6 16v rapier

Description:

I'm swapping my mums peugeot 307 1.6 rapier it's got 11 months mot 4 months tax really nice to drive it was under disabled tax but I just had it changed over to normal this car has never been taken over 70mph really well looked after
Good bits
It's got electric windows, central locking, electric mirrors, air con, alloy wheels, paddle control for stereo USB and aux input
Bad bits
I pushed the seat to far back when cleaning it and knocked one of the clips underneath so keeps saying airbag fault but I've had it checked and the airbags fine. The only other thing is the cd changer don't seem to work but apart from that the body, tires and engine are all good needs a new battery for key fob opens to offers why??