Is it a knocking or clicking? Do this test when driving your car have the window down and listen. drive in a straight line if you don't hear any noise press on the brakes. if you do hear noise let me know what kind of noise it was. Now drive the car and turn to your left (all the way left do donuts) if you hear a clicking noise its your CV AXLE (busted) and they need to be replaced. Do the same test to your right side.Automotive Technichain for 23 years