FYI Hedley above said "The repair is difficult and expensive since the air bag has to be disabled with special computer softwear"
This is NOT true, the battery only has to be disconnected and wait five minutes for the airbag's backup supply to drain. Then you can just take it out - which is incredibly fiddly, but no software is needed. Done it several times on MK3 Clios.
Matt Dempsey, October 2018