Well mine pulled to the left, now it goes straight, both my lower balljoints were worn the drivers side badly. I had them replaced at Aaron's autos in Leeds. Car had covered 30,000 miles put it pulled to the left from 23,000. Any garage should be able to check them. Lift on a 4 post hoist put the wheel on full lock and push and pull the wheel you can see movement on the balljoint or not. I paid £175 for each side, Renault will charge you £650 plus a side. Be careful who you use to replace the balljoints as you can wreck the upright if it is not done correctly. I travelled 400 miles to have mine done, but a saving of £1000 made it worth while.