These parts should be suitable for the 1.4l engines (2012-2019).
Engine Oil (aftermarket)
If you are looking for just replacement aftermarket Oil that meets the Fiat/Chrysler Standard of API Certified SAE 5W-30 Engine Oil, meeting the requirements of Chrysler Material Standard MS-6395 (spec is in the owners manual). It doesn’t require synthetic oil, but I am partial to getting a full synthetic. Castrol Edge $20 USD for 5 liter bottle on Amazon.com with free Prime shipping. Also available locally from places like Walmart, Pepboys and O’Reilly’s.
Engine Oil Filter (OEM)
If you are going to buy your oil and filter separately, but want to get the original OEM oil filter, it is Mopar Part Number 68102241AA. The part includes the filter and new o-ring. You can get one for about $8 here on Amazon.com. There are other aftermarket ones, but I can’t see why to bother at this price.
Cabin Pollen Filter (upgraded aftermarket)
I’ve been partial to upgrading to a better cabin filter for less money. The ATP automotive Carbon Activated Premium Cabin Air Filter part number TA-11 is an activated charcoal filter to filter out odors as well. Available for about $26 USD from Amazon with free prime shipping (here)
The Fiat owners manual calls out for Mopar 10 Year/150,000 Mile OAT Coolant 50/50 Premixed (p/n 68163849AB). Coolant must meet Mopar standard MS-12106. It states it take 4.6 US quarts, so just over two 4 quart bottles would be necessary. It can be found online here for about $18 USD per bottle.
It only requires DOT3, but I think DOT4 Full Synthetic Brake fluid is appropriate. About $12 USD (online here) for a 32 ounce bottle (which should be enough for a full fluid flush).