teeceew

Hi
Has anyone any answers for me, i having a knock/cracking noise when i apply light pressure on the brake pedal at approx 20mph could be from front or back or both the car has only done 15k, a local garage has suggested its the rear pads worn thin allowing the metal holder to knock together, however , as expected when they renewed the rear pads the noise is still in existance maybe it will be resolved if i get the front ones done as well if not has anyone any ideas, the fault does not affect the braking.

Thanks