1.9 or 2.2?
both suffer with turbo problems and egr problems
best to get the egr valve out and clean it each service
and when the turbo goes, you find it rev's its tits off and usually on the 1.9's throws a rod! unless you can stall it!!
the 2.2's seem not to go too mad, but I've had one rev up, managed to stop it by clamping the intercooler pipe rather quickly!
apart from that
laguna's suffer with front and rear subframe bushes going, and they us'd to eat wishbones, but i think they managed to fix that
apart from that, they are a good car!