Onto my 4th, 3 Mk V and currnt MkVI, and whilst none of them have had a lot of miles on when I’ve gone back not a single has shown any problems. With the exception of thee exhaust sensor went on my current a few week ago at around 25k miles, replaced under warranty in a few hours without quibble.
Other than that nothing, not even a hic, bulbs or a even a rattle.
They are excellent engines, responsive and plenty of torque to pull bikes and blokes around on trips away.
infact most modern diesels seem to have issues
That can’t possibly be true as you didn’t add FACT to the end. 😆