Sorry but on modern cars with higher belt change intervals you are taking a huge risk not changing the pulleys, the service life on a pulley or tensioner is about 80k at best, if your belt change interval is at 50k which most renaults are then the tensioner and pulley wont last the second belt unless you are very lucky. Also you will probably not be covered by warranty if the tensioners are not changed, I run a motor factors and have seen several garages have warranty claims rejected when a belt failed scrapping the engine because they tried to do the job on the cheap and one of the idlers or tensioner failed causing the belt to slip. From personal experience I would never change a belt without doing the job properly, my missus runs a little Fiat Cinquecento and about 4 years ago it needed a new waterpump, got a mobile mechanic to do it and supplied belt, tensioner and waterpump. Cambelt had been changed 15k before, and clever mechanic decided not to change the tensioner because "it looked ok to me" about 6k later doing 70mph on the motorway the engine starts to misfire. Tensioner had failed due to being released and reset and the belt had slipped luckily the fiat has a non interference engine and just needed a new belt and tensioner, one of our work vans needed £3000 work when a similar thing happened. Sorry for the long post but I really wouldn't gamble £50-£75 quid against a new engine especially on a 6 year old car that might not have had the job done properly before. Mike

Hi as long as the parts fitted to your car are classed as "matching quality" and the work is carried out by a reputable garage no manufacturer can deny a warranty claim on the basis of not using dealer servicing or genuine parts (this applies for brand new vehicles as well as second hand) this has come about following the new block exemption regulatons, the ATF have bought test cases against most major manufacturers and won. For parts to be matching quality the manufacturer must supply some o.e. parts. ie Delphi are oe supply for several vehicle manufacturers so all there braking parts are said to be matching quality. If your warranty is an insurance backed one from an independant car dealer check with them but as very few car dealers do servicing as long as work is carried out at reputable (VAT registered etc) garage this should not be a problem. Timing belts on modern cars are expensive, but the labour rate varies massively from garage to garage, main dealers are about £70+vat per hour GOOD independants who send their mechanics on decent training courses about £45+vat back street garages from £20 upwards. An oe spec timing belt kit with all tensioners will be between 70 and 150+vat depending on what engine you have in your car. DON'T be cheap and just get the belt changed, make sure you have the tensioners and idlers changed, most don't last for 2 belts the you get a big bill to replace the engine. Try to get SKF or Gates kit fitted as these are the best. £230 for discs and shoes probably isn't too bad as to do the job properly (again slightly guessed prices as I don't know the exact details of your car and I'm not at work) about £40 pads, £70 discs (these could be lots cheaper if a small engine) £45 shoes, couple of hours to fit. Hope this helps Mike