The D4FB is a variant of the U - family of Hyundai diesel engines. There are other variants such as the D3FA, D3FB, D4FA etc. The D4FB is the 4 cylinder 1.6L variant.
Brendan,
Thank you for your reply, excellent explanation and info.
Hyundai did seem to make it a tad more complicated than needed - but that might be just me. That site is handy, I've bookmarked it for future reference. Amazing level of detail on it about one's car.
Odd Hyundai went 'forwards' from a chain to a cam belt - sounds like a questionable improvement.
FWIW that site lists my car as a G3S61EC5U, engine is a HR86
The thing that triggered all this was that while the OEM fitted fuel filter part is a 31922C8900 (which is a Z707, something I was only able to ascertain AFTER it was removed) - a bunch of websites including Ryco's state that it is instead a Z615???
This was completely incorrect - and sadly why I'll be popping 4 unused Z615 filter up here for another member to buy at a pinch as I bought them based on this info.
So I assume its just Ryco thats stuffed up their info - rather than Hyundai. Still somewhat odd as you'd think they'd know such basic things, we're not talking about the diameter of a washer used on some obscure part of the car.