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What would cause a knocking sound from front left of car when braking and gets louder faster as you apply more brake?

* Worn brake pads: When brake pads wear down, they can become thin and make a knocking sound when they come into contact with the brake rotor.

* Loose brake caliper: A loose brake caliper can cause the brake pads to move around and knock against the rotor.

* Damaged brake rotor: A damaged brake rotor can cause the brake pads to vibrate and make a knocking sound.

* Worn ball joints: Worn ball joints can cause the front end of the car to move around and knock against the brake rotor.

* Failed wheel hub bearing: A failed wheel hub bearing can cause the wheel to move around and knock against the brake rotor.