No worries, just blind with no details lol. I've had a look around and cant see a specific 'O' ring part number. It might be best to give your local Kia dealer parts department a ring. They will have the number and probably the part. Be cheap as its a service part and on shelf.Sorry Stonie! It’s a 2014 1.6 crdi. It doesn’t have stop/start which I think is the D4FB engine?