One of my dads customers is Renault freak, the last few clio's and meganes have all had a mystery belt throwing/chewing problem....
After many trips to Renault and many £££ spent they asked my dad to look at it, lots of head scratching later he found that when he revved the engine hard the bottom pulley moved in and out by about 6mm

He referred back to his mate who runs a big garage specialising in engine and gearbox work, apparently the crank bearings wear and allow the shaft to thrust back and forth wearing out the belts and everything connected to the crank......
Gearboxes are a nightmare too!
As it has been said before they are great cars when new but quickly fall apart after they get closer to 100k or have some real abuse.
Still some folk like them and all makes have there downsides, you pays your money and makes your choice
I wont have one, having a French misses is enough
