How can a co-driver's seat airbag for a peugeot 306 be disabled

As far as l know It cannot be done,you can disable ALL airbags as we do when doing major repairs to a vehicle and then enable all airbags as they work from the same on-board computer/shock sensors,apart from physically taking the airbag out of it is compartment,DO NOT attempt this please as you could get very seriously hurt if it goes off,it flies out of it is compartment at 300 kilometers an hour and that will hurt you bad

You may be able to disable it. It can be done on my 1999 306 however l have seen a similar aged 406 which did not appear to have this feature, so l do not know if all 306s have the disabling feature.

On my 306 there is a red lock by the steering column which u can turn from on to off using the ignition key. This will disable only the front passenger airbag (meaning l can carry my kids in the front seat). It will show the airbag light on while the airbag is disabled.
Remember to turn it back on if u carry an adult in the front.