It is important to respect the vehicle’s maintenance programme and replace the belt at the recommended age or mileage, whichever comes first.A worn timing belt can break causing severe engine damage. When warning signs appear, it is often too late resulting in engine failure and expensive repairs may result.
It is important to anticipate and think about your timing belt if your vehicle:
1. Is more than 5 years old
2. Has covered over 60,000 miles
3. You can replace your timing belt at your nearest Renault Dealer.
Source : http://techprotools.blogspot.com/