Hi everyone, first of all I'm new so go gentle with me and my car mechanical knowledge is very poor! I recently changed my front tyres and noticed a worn pipe or cable slightly behind but above the front brake discs, this was on both sides. The pipe/cable is rubbing where it passes through an oval metal ring where it is obvious a rubber grommet has failed. First of all does anyone know what this pipe/cable is for and secondly has anyone any idea of the cost to correct this problem. Thanks for your time