Broken belt idler.

[Dan@SJM]

Not quite a clio, but a scenic with a VVT F4R, belt was changed on time by a Renault dealer over in Wales that has since gone bankrupt. My suspicions are that they didn't change the idlers as the tensioner is like a roller skate bearing.

 

[Chip-mk1]

Could also be a non genuine one, I stupidly used one on my Williams engine as I wanted one in a hurry and renault were saying days till they could get it.
It lasted sub 2K miles

 

[Dan@SJM]

True, haven't looked at the bearing make as yet. Still pullin pieces of plastic out from around the belt cover

 

[Dan@SJM]

It's taken 4 guides with it atleast too.