None of this will help....
my family has driven over 200k in probably 20+ "ownership years" with Renaults and the worse thing that happened was the solenoid went on the starter of our R21 with 150k on the clock and 12 years old. Apart from tyres/brakes/oil/filters and a set of glow plugs, our scenic 1.9tD we just sold (1997) had 100k on and since we bought it with about 35k at 3 years old, it hadn't had ANYTHING else spent on it. It was on its original clutch (despite having done 5k on 2 seperate european holidays towing an oversized caravan) etc. etc. It just didn't need anything doing. Oh wait, we change the battery at 5 years old

My laguna the same (owned for about 3 years or so? 25k or so) but obviously shorter time and fewer miles. ALl our R21s were the same and our newer scenic (now 15k down the line), fine. Our new shape megane had so many electrics it is bound to go wrong though (life time warranty

). No head gasket failures or anything like that.
My point? People still put Renaults low on reliability but those listed above weren't cared for more than any other car and they went fine.
My Uno (once time and effort put into it and vacuum advance problem found which made it stall) was perfect for a year and 8k, except the windscreen wiper flying off
The uno isn't though of as a particularly reliable car but it was fine for me.
Infact the only car I have experience of actually properly breaking down is my Grandpa's xsara where the glowplug control unit failed (relay) rather randomly.
Maybe I/we(my family) are just lucky, touch wood. However, personally, I feel like it seems near impossible to define a car marque as reliable or not, despite what various tables and top gear say.