Yes. Enter your UK registration in the search tool to see tyres that match your Fiat 500X fitment, then double-check the size on your current tyre sidewall for reassurance.
Look on the tyre sidewall for a format like 215/60 R16, or check the tyre size label on the door jamb or your owner’s handbook, then enter those details in the search.
You can book a fitting at a local garage during checkout, choosing a date and time that suits you, so the tyres are supplied and fitted in one organised order.
If only two tyres are needed, replacing them as a pair is common, and fitting the newer tyres to the rear axle is often recommended for stability. Replace all four if wear is even or you want a matched set.
Tyre pressures vary by wheel size, load and driving conditions. Use the pressure label on the driver’s door jamb or the owner’s handbook, and check pressures when tyres are cold.