What the belt does here
It keeps the crank and cam in time so pistons and valves do not meet. Wear is often silent. Age matters on a low-mileage car that only does short trips.
The French article is explicit: this 1.6 HDi is not the wet-belt PureTech case, but garages still treat timing as a planned job, not a wait-until-it-snaps job.
Interval — this engine only
Numbers circulating for the 208 1.6 HDi sit around 175,000 km or 10 years; some papers mention about 180,000 km or 7 years. Severe use (city, towing, heat) is why the article talks about bringing that forward, sometimes toward 150,000 km. None of this is a petrol engine’s interval, and none of it replaces the manufacturer schedule for that car.
The water pump is often replaced with the kit if that belt drives it.
Translation of the live French article. Not a diagnosis. Service intervals stay with the manufacturer.