The brake pads are most likely worn and the metal backer is digging into the rotor. Check the brakes before a rotor breaks and you are without brakes.
Typically, a knocking noise when to use your brakes in the car is caused by your brakes wearing down. This means you need to get them checked out and repaired.
A knocking noise when coasting in a vehicle could be caused by issues with the engine, transmission, suspension, or brakes. It is important to have a mechanic inspect the vehicle to determine the exact cause of the noise.
Slam on your brakes. If your brakes lock up, then you do not have ABS. If your brakes do not lock up and you hear a knocking type of noise from your brakes, then you have ABS.
If you suspect something, get them checked. If you get vibration while applying the brakes, get them checked. If you get grinding noise from the brakes, get them checked.
I would advise bringing your car to a mechanic as quickly as possible. Your brakes could fail. This puts you at a high risk for injury or even death.
loose rear caliper or drum brakes, could be loose hardware or on disc brakes, possible warped rotor
When there are any issues with your brakes it is best to take your car in to a certified mechanic. Brakes can knock for several reasons, including the calipers, brake pads, and bearings.
knocking noise
Pull the rear wheels off and check the brakes. Something may have broken or fell apart.
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.
brake pads could be worn out. would it be safe to drive for now if the front brake pads are ok?
Yes, brakes can make noise when wet due to water causing friction. To prevent or reduce the noise, you can try drying the brakes by gently applying them while driving, using brake pads designed for wet conditions, or having a professional inspect and possibly lubricate the brake components.