What causes a knocking in the frontend when you apply the brakes?

A knocking sound in the front end when applying the brakes can be caused by several issues, including worn brake pads, loose or damaged brake components, or failing suspension parts such as control arms or bushings. Additionally, if the brake calipers are not securely mounted or if there is excessive play in the wheel hub, it can lead to a knocking noise. It's essential to have the braking and suspension systems inspected by a professional to identify and address the underlying cause. Ignoring this issue can lead to more significant safety concerns.