Terence

Put some washing up liquid around the valves see if they bubble

Are you checking the valves on your tyres,

Not sure if this helps i am in England, right hand drive, if you look to the left between the headlamp and the radiator, look down there a wire about 6 inches long with a green connector, it goes to a plastic with a sensor on it, found out it controls the aircon, rad fan and yes the passenger side airbag ,check it out for any of those things going wrong, then if ok that's one sensor you can illuminate, hope it helps

Theres no exposed metal parts only screws and bolts underneath the bumper, so no need to put anything under the car

Does anyone know what this plastic plug does its blue at the top and green it comes from under the slam panel and connects to a plastic covering at the front of the rad panel, thanks

I bought a damaged spark, front impact, but no airbags deployed, stripped the front down saved the 2 radiators, but bought a replacement front rad panel, turned the ignition on and air bag light red, also showing on center of dash passenger air bag off, on the slam panel there is a sensor under the bonnet lock, connected that and all good air bag light off and passenger air bag on, might help somebody

Passenger air bag