It looks to be the same insert but pushed further in and threaded internally. If you could remove it or prise it further out you could reconnect the PCV
You can remove the airbags but the airbag ecu needs to remain or you’ll get an EML. Everything from the rear plug can go, wires to the front airbags can go but I’d leave the rest
Brand new ones are unavailable from Renault now unfortunately. The only option is to have someone replace the micro switches. There is a lad on Facebook called Tyler Bell who does this or there is a guide on here. Quite an easy DIY if you’re patient
Vid
Watch the above video, it’s great to visualise it all.
You’re pushing against the valve springs when trying to get it bang on. Don’t worry too much about it being bang on prior to equalising the tension in the belt as it’ll move once you wind the engine around. As you pinch up the pulleys...
The PMS breather plate doesn’t fit with the standard inlet unless you machine down the TB and the plate itself. Best off sticking with the OE breather and either using push on hose or weld on an AN10 fitting.