I have a renault megane scenic 1.9DCI. when travelling 30mph and above there is a grinding noise from one of the front wheels. when i turn right the noise is still there but when i turn left it disappears. Could this be a wheel bearing? If so, which one?
thanks

unders, September 2009

Yes, probably wheel bearing.
Jack up the front left wheel and give it a spin, if the bearing is worn it will sound/feel rough.
Grip the wheel top and bottom and rock it in and out, any free play would also suggest wheel bearing.
Repeat tests on right front wheel.
Remember to use a stand as well as the car jack for safety.

laguna, September 2009