Your Ford Fiesta is a 2016 model with an EcoBoost engine, so it may have a wet belt, but during this period Ford changed the design of the EcoBoost engine and changed the timing belt for a timing chain, which is much more robust. If your car is an EcoBoost Hybrid with a mild hybrid system, then you have a timing chain. However if it is a non-mild hybrid version then it has a wet timing belt. You can read more about wet belt engines here: www.honestjohn.co.uk/advice/owning-advice/wet-belt/