what a stupid question you have given no info about anything or what the car is and expect an answer go smoke another joint or something because this is a waste of time
first answer is just someone iggnorant the knocking could be your rear end going out caused by gears slipping if your brake pads are bad your calipers could knock and then so destroy your brake system if your car vibrates at high speed (60<) you could have a drive shaft issue which could cause wear on your rear end and could be causing the knock then again it could be the dead body you forgot to take out
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.
warped rotors , brake
many many things, Loose lug nuts which lets wheel make knocking noise. Engine will make a knocking noise if it is really low on oil. Some timing belts make a knocking, slapping noise just before they break.These are just a few examples . Have someone ride in car with you as you duplcate the noise and see if they can determine which part of the vehicle it is coming from.
Its hard to say... do u know where the noise is coming from?
it could be your valves or your engine
you may have a rod knocking and you need to take it to a shop asap
The thing that could cause a knocking noise in your car is the same thing that could cause it in all cars A rod that or a flat lifter. it all really depends on where the knock is if its higher and to the back of the motor, it could be a motor mount
knocking noise
A loud knocking noise in the motor of a car at high speeds is most likely the engine. There could be another issue with the transmission if the knocking only happens at high speeds.
your cv boot has torn and needs replacement
Cant you just ask the people at the car place?
It's the spirit of the car knocking on the side saying "HELLO??? TAKE ME TO A MECHANIC!"