four bolts per seat and an airbag connector - on the standard seats its on the side - remove the plastic cover on the side base of the seat and disconnect the multi-plug
(i didnt disconnect the battery to change the seats.....just left it for 10mins before unplugging)
disconnect battery and leave 30mins
recaros just bolt straight in and the airbag connector is underneath - just plug straight in - but need to make sure the resistor is fitted because they dont have "anti-submarining" airbags in the seat cushions