* Worn or damaged brake pads: If your brake pads are worn down to the metal backing, they can make a clunking noise when you let off the brake. This is because the metal backing is hitting against the rotor.
* Loose or damaged brake caliper: If the brake caliper is loose or damaged, it can also make a clunking noise when you let off the brake. This is because the caliper is not properly securing the brake pads against the rotor.
* Damaged control arm: A damaged control arm can also cause a clunking noise when you let off the brake. This is because the control arm is responsible for controlling the wheel's movement, and if it is damaged, it can cause the wheel to move incorrectly, which can in turn make a clunking noise.
* Loose wheel lug nuts: Loose wheel lug nuts can also cause a clunking noise when you let off the brake. This is because the lug nuts are responsible for holding the wheel in place, and if they are loose, the wheel can move around and make a clunking noise.
