This will vary, I personally have just had a quote on my 1.6 scenic for timing belt plus tensioners plus water pump plus labour at £260. But this will vary from garage to garage. I would not recommend that you do this job yourself if you are not a mechanic, as a mistake can be costly, if fitted incorrectly and it snaps it could bend up your valves, meaning a rebuild of the head, or replacement of head ( cheaper if got from scrapyard.)
timing belt
how to change Renault megane timing belt
from 300 to 500 depending on engine and the area you are
This should be done every 36000mil or 60000 km to be sure, they are rated to last as long as 100km but you needs to take driving habits into consideration.
50k
120000 km
I paid £360, although I got a few quotes around £500.
If it's a Scenic model about £300+. If any other model alot
I have a 2001 2ltr Expression and it has a timing belt.
According to the Gates website it has a chain and not a belt. To be sure look in your owners manual or contact your Renault dealer.
Very high probability of valve damage. Havent seen one yet that hasn't bent valves when belt broke. hope this helps
60.000 miles should change cambelt.