The 1.9 was the real troublemaker in this department. Things have improved radically since Renault started speccing a higher grade
, though they've now lowered the service interval too.
The worst case scenario is a nasty one: The engine runs with no restriction (at extremely high RPM's) on its own engine
until it siezes, though if you have a manual transmission and are prepared for the problem, then deliberately stalling the engine will save it. Obviously you'd still need to get the cause of the problem sorted (probably a new
at that point) but at least you won't need a whole new engine. As this problem has been a lot more common than it should be, Renault will often make a large contribution towards the cost of repairs.
problem may be unusual to Renault, but the problem of the engine destroying itself in this manner is far from unique to the brand. I've heard of very similar problems with BMW and Land Rover diesel engines. I have no doubt that there are others.
One further thought: If you're doing mostly urban mileage, then avoid diesel engines with the
filter. The filter clogs up over time and needs a good long blast of high speed driving every now and again to clear it. The dealer should explain this to you when you buy the car, but a lot of them don't bother.