I don't know if the emissions tests are different in other countries so I specified UK.
A garage just failed my girlfriends 1.4 Golf MK4 and said it was smoking bad, they tried sparks, cat, lambda, oil change and a couple of other common things, they say it's engine strip/replace time.
I read on more than one forum that the piston rings can go on these cars. Is that the most likely cause of the failure? The engine wasn't particularly well looked after before she has only had it a year.